1/17/2017 new driver models for direct download:1166
A4tech Op-50 5 stars review"The best driver WIKI ever! I wil keep coming back for sure."Eric Smalter, Boston, MA
Supported languages for A4tech Op-50
Certifications for A4tech Op-50
5 stars for A4tech Op-50 "WOW! Finally my PC got up to speed!" Melany Kim 7/18/2015

Checking...for 1/17/2017 Updates

All drivers on are updated on daily basis.

However, a new version of A4tech Op-50 might have been uploaded since our last site update.

A4tech Op-50 Driver Download

Windows Compatibility for A4tech Op-50 driver

A4tech Op-50 Driver Details:

A4tech Op-50 File Name:

A4tech Op-50 Driver Version: 1877i5

A4tech Op-50 ZIP Size: 118.kb

Manufacturer: A4tech

A4tech Op-50 was fully scanned at: 1/14/2017
Scan Status: driver download scanOK

A4tech Op-50 special revision for: Windows Vista Home Premium 64 bit, Windows XP Media Center Edition 2003 64 bit, Windows 8 Pro 64 bit, Windows XP Media Center Edition 2005 32 bit, Windows XP Media Center Edition 2004 32 bit, Windows 8 64 bit, Windows XP Home Edition N 32 bit, Windows XP Professional N 32 bit, Windows Vista Starter 64 bit, Windows 7 Professional 64 bit

A4tech Op-50 Download Stats:

Driver Uploaded: 12/13/2016

Direct Downloads: 138
Most Recent Download: 1/15/2017
Managed Downloads: 3595
Most Recent Download: 1/15/2017
Download Mirrors: 2
Current Delay: 11 Seconds
Driver License: Free to the general public

Direct Download Success Stats:

Reports Issued By 132/138 Users

Success Reported By 22/132 Users

Driver Download Score68/100

Driver Installation Score70/100

Overall preformance Score69/100

A4tech Op-50 2 Thumbs Up2Thumbs
A4tech Op-50 0 Thumbs Down0Thumbs
A4tech Op-50 driver direct download was reported as adequate by a large percentage of our reporters, so it should be good to download and install.

Installation Manager Success Stats:

Reports Issued By 2861/3595 Users

Success Reported By 2167/2861 Users

Driver Download Score94/100

Driver Installation Score82/100

Overall preformance Score87/100

A4tech Op-50 2115 Thumbs Up2115Thumbs
A4tech Op-50 165 Thumbs Down165Thumbs
A4tech Op-50 driver installation manager was reported as very satisfying by a large percentage of our reporters, so it is recommended to download and install.


1. Direct Download

Select your OS and press "Download".

This option requires basic OS understanding.
Select Your Operating System, download zipped files, and then proceed to
manually install them.
Recommended if A4tech Op-50 is the only driver on your PC you wish to update.


2. Driver Installation Manager

This option requires no OS understanding.
Automatically scans your PC for the specific required version of A4tech Op-50 + all other outdated drivers, and installs them all at once.

Please help us maintain a helpfull driver collection.
After downloading and installing A4tech Op-50, or the driver installation manager, take a few minutes to send us a report:
* Only registered users can upload a report.

Don’t have a password?
Please register, and get one.

A4tech Op-50 may sometimes be at fault for other drivers ceasing to function

These are the driver scans of 2 of our recent wiki members*

*Scans were performed on computers suffering from A4tech Op-50 disfunctions.

Scan performed on 1/17/2017, Computer: Compaq GM442AA-ABA SR5125CL

Outdated or Corrupted drivers:6/19

Device/DriverStatusStatus DescriptionUpdated By Scanner
Microsoft Trusted Platform Module 1.2Up To Date and Functioning
Mice And Touchpads
Microsoft Logitech USB Wheel MouseCorrupted By A4tech Op-50
Logitech Logitech HID-compliant Cordless MouseCorrupted By A4tech Op-50
Logicool Logicool HID-compliant Optical Tilt Wheel MouseCorrupted By A4tech Op-50
Usb Devices
VIA Standard Enhanced PCI to USB Host ControllerUp To Date and Functioning
Sound Cards And Media Devices
Analog Devices SoundMAX Integrated Digital AudioUp To Date and Functioning
Network Cards
Realtek Realtek PCIe GBE Family ControllerUp To Date and Functioning
Microsoft Keyboard Device FilterCorrupted By A4tech Op-50
Hard Disk Controller
Intel(R) ESB2 SATA AHCI ControllerUp To Date and Functioning
Nokia Nokia USB PhonetUp To Date and Functioning
NEC Generic CardBus-kontrollerUp To Date and Functioning
Intel(R) Sensor SolutionOutdated
Western Digital My Net N900 Router StorageUp To Date and Functioning
Cameras, Webcams And Scanners
EPSON EPSON Stylus CX6400Up To Date and Functioning
Video Cards
NVIDIA NVIDIA GeForce GT 640MUp To Date and Functioning
Input Devices
Logitech Logitech WingMan Digital DeviceUp To Date and Functioning
Port Devices
Mobile Connector Device Diagnostic Interface (COM11)Up To Date and Functioning
Sony Digital Flat Panel (1024x768)Outdated
Mobile Phones And Portable Devices
Acer NOKIAUp To Date and Functioning

Scan performed on 1/17/2017, Computer: Toshiba Satellite A200-12X

Outdated or Corrupted drivers:5/19

Device/DriverStatusStatus DescriptionUpdated By Scanner
Hewlett-Packard HP NC371i Virtual Bus DeviceUp To Date and Functioning
Mice And Touchpads
Microsoft Microsoft USB Basic Optical Mouse (Mouse and Keyboard Center)Up To Date and Functioning
Microsoft Microsoft USB IntelliMouse Explorer 3.0Up To Date and Functioning
Usb Devices
HTC HTC ModemUp To Date and Functioning
ONDA ONDA CPO DeviceUp To Date and Functioning
Sound Cards And Media Devices
Advanced Micro Devices AMD Radeon(TM) HD 6520GUp To Date and Functioning
Network Cards
Intel(R) Ethernet Connection I217-VUp To Date and Functioning
Microsoft Keyboard Device FilterUp To Date and Functioning
Hard Disk Controller
NVIDIA NVIDIA nForce 430/410 Serial ATA ControllerCorrupted By A4tech Op-50
Nokia Nokia C6-00 USB Phone ParentCorrupted By A4tech Op-50
Mad Catz Programmable Support for KeyboardUp To Date and Functioning
Intel Intel(r) AIM External TV Encoder Driver 0Corrupted By A4tech Op-50
Initio Initio Default ControllerUp To Date and Functioning
Cameras, Webcams And Scanners
Canon Canon MP160Corrupted By A4tech Op-50
Video Cards
ATI ATI Technologies, Inc. 3D RAGE PRO AGP 2XUp To Date and Functioning
Input Devices
Logitech USB-HID (Human Interface Device)Corrupted By A4tech Op-50
Port Devices
Huawei Vodafone Mobile Broadband Diagnostics Port (Huawei) (COM23)Up To Date and Functioning
Sony Digital Flat Panel (1024x768)Up To Date and Functioning
Mobile Phones And Portable Devices
Acer NOKIAUp To Date and Functioning
Driver ModelOriginal Upload DateLast ModificationDriver FileFile SizeCompatible Computer ModelsAvailabilty To Instalation Manager
A4tech Op-50 4024410/29/201412/27/2016a4tech_op-50-40244.exe171kbSony VPCEB19GX, Toshiba SATELLITE C855-1X3, Pegatron C17B, HP P6-2006es, Dedicated OEM-A4501-00, Fujitsu FMVLRD7N24, IBYTE UDP GN ANDROS-I36L, EUROCOM Panther 5D, HP KZ692AA-ABU, NEC PC-VL750CS, Panasonic CF-30KBPAX2M, HP HPE-550be, Sony VPCSE23FX, Lanix BRAIN 4140, Lenovo 7659YAN, and more.
A4tech Op-50 70371.112/28/201412/28/2016-70371.1.exe161kbHP WC734AA-ABD 1130de, Lenovo ThinkPad Edge E530c, Olidata H8DA8/H8DAR, Sony VGN-FW17GU_H, Lenovo ThinkPad X60 Tablet, KONTRON B649, Compaq Presario 5471EA 470030-395, Acer AOA150p/BGW, BOXX 3DBOXX W8920, SAMSUN M2410, HP HP Compaq Presario CQ61, Foxconn Inferno Katana GTI, HP 110-009el, IBM 81387HG, Gateway CT5628, and more.
A4tech Op-50 8364810/3/201412/30/2016a4tech_op-50-83648.exe24kbSony VGN-TZ27GN_B, Panasonic CF-18KH2ZXBC, Sony VGN-BX94PS, Sony SVE15127CAP, HP Presario V6000, IBM 8187SYU, LG B55PS.AR3500D, Toshiba IS 1462B, Acer AS5732Z, IBM IBM IntelliStation M Pro -[922962J, HP HP Pavilion dv6000, and more.
A4tech Op-50 8090912/21/201412/28/2016a4tech_op-50-80909.exe209kbWIPRO WNBOBM4930-EK-0015, HP Presario C300, Toshiba Qosmio D730, HP HP Pavilion TS 14 Notebook PC, Fujitsu LIFEBOOK NH532, Fujitsu FMVD70BNB7, NEC VERSAL2101 RND51047895, IBM ThinkPad R30, Panasonic CF-S10AY6DC, AT COMFOR OFFICE I10 SI, Sony VGN-SR430J, Dell Inspiron N4050, HP HP Compaq dx2390 Microtowe, SAMSUN 350V, Toshiba SATELLITE C855-1TE, and more.
A4tech Op-50 29281/17/201512/29/2016a4tech_op-50-2928.exe92kbHP P6-2455eb, HP FL308AA-ABD IQ512de, Dell Dimension 9100, Sony VPCF136FX, Fujitsu FMVS54DBY, Acer AM1620/VeritonM262, HP KB010AA-AKB a6330.cs, Compaq P8657J-ABA SR1000Z NA441, Sony VGN-TZ36L_B, Toshiba Dynabook TX/65DJ, Sony SVS13A17GBB, Lenovo 1S16800367700DD, Packard Bell IXMM5740, HP PN089AA-ABF m1180.f, and more.
A4tech Op-50 B1.13701.112/22/201412/30/2016a4tech_op-50-b1.13701.1.exe215kbSony PCG-K215M, HP WC812AA-ABV HPE-130me, LG P2-TP2007, Sony VGN-Z90NS, NEC PC-VJ22MAUZHTTV, IBM 2374F14, Sony VGN-AW290Y, Lenovo ThinkPad T410s, Gateway 6834MX, MSI MS-7521, HP 20-a218d, NEC KV2, SAMSUN 200B4Z/S01TH, WIPRO WIV37455-0198, HP GS407AA-ABZ, Packard Bell IMEDIA 6430, Dell PowerEdge R410, IBM ThinkPad T30, and more.
A4tech Op-50 833032/28/201512/28/2016a4tech_op-50-83303.exe106kbECS SMACKER II-MS300, HP GU508AA-B14, Toshiba SATELLITE P50-A-14L, HP DV6 - 3206AX, Sony VGN-FE570G, Samsung P580, Packard Bell IMEDIA MC 8236, HP EC581AA-B1U, HP RR518AA-ABH S7730, Fujitsu LIFEBOOK E8310, LG S550-GE6AK, Lenovo 20BC0000MH, NEC PC-MJ26XRZWDSBJ, and more.
A4tech Op-50 IMac5,1, Fujitsu FMVXNN481Z, HP P6714it-m, NEC PC-LL750FS1SR, HP VG123AA-ABF p6127f, HP HP Pavilion 0 Notebook PC, NEC PC-VL150GS, Sony VGN-AW37GY_Q, Lenovo ThinkPad Edge E330, HP HP ProBook 6560b, and more.
A4tech Op-50 Z2.1362.1912/3/201412/28/2016a4tech_op-50-z2.1362.19.exe38kbLG LW65-K5JY, Epson Endeavor Pro8000-H, HP HP 14 Notebook PC, Sony VGN-NW250D, HP 3600, Packard Bell IMEDIA X5609 BE, IBM System x3200 M3 -[7328EAG, NEC RND61092195, Samsung 550P5C, Sony VGN-FZ180U, Acer Aspire X5900, HP FL447AA-ACB a6641ru, ELITEGROUP 330, LG R560-UAPW3E, and more.
A4tech Op-50 1.133062/26/201512/30/2016a4tech_op-50-1.13306.exe173kbCompaq EP103AA-ABU SR1709UK GB610, HP Pavilion ZV6000, Lenovo 8927W1L, Sony VGN-SZ56LN_B, IBM 6221PMG, Gateway M-7332H, HP FL379AA-UUZ m9480ch, LG R470-KR30K, AnabelleB Graduate VA20, MSI CX61 0NC/CX61 0ND/CX61 0NF/CX61 0NE, GIADA GIADA, Lenovo ThinkPad Edge E530, ALFATRON SpA DN1010/M, Lenovo ThinkCentre M90, and more.
A4tech Op-50 7386611/14/201412/29/2016iotbok-73866.exe185kbToshiba Satellite R630, Panasonic CF-53AAC34ZG, HP XXX, Fujitsu FMVNP8A7, Seneca U53131, NT Computer ACCENT Q 6600/501, IBM System x3650 M3 -[7945K4G, Toshiba SATELLITE L850-1J9, HP 520-1070uk, HP HP Pavilion DV9000, NEC PC-VK26TXZNG, Packard Bell EasyNote_BG48-U-332CH, Packard Bell IMEDIA 6430, IBM 921035M, and more.
A4tech Op-50 2.122762/17/201512/27/2016a4tech_op-50-2.12276.exe53kbHP HP Compaq Presario CQ61, Foxconn Inferno Katana GTI, HP 110-009el, IBM 81387HG, Gateway CT5628, Gigabyte P35-S3, FIC VA250U, IBM 8187SYU, VOYAGEURPC Warranty 06/23/2014, HP HP Pavilion zd7000A, Gateway S-7220M, Packard Bell EasyNote_MX37-V-058NL, Compaq Presario 1201EA 470019-012, Gateway GM5632E, Toshiba PSK1SE-005002GR, Toshiba Satellite A110-293, HP PJ425AA-ABN, HP KE530AA-ABD a6212de, and more.
A4tech Op-50 707242/23/201512/30/2016a4tech_op-50-70724.exe113kbFujitsu FMVNFD40, LG T1-5224A3, IBM ThinkCentre A52, Sony VGN-FW43G_B, Haier H53, Gateway GT5082B, HP HP Pavilion dv9575EM, HP FR471AA-UUW a6655sc, NEC PC-VN770JS3EB, NEC PC-LL5006D2DR, Compaq P8657F-ABA SR1000V NA510, NEC PC-VJ22ERNTHGLB, Fujitsu FMVA42EWKS, Lenovo 20AQCTO1WW, HP VS303AA-ABD P6000, Toshiba SATELLITE PRO L770-12P, and more.
A4tech Op-50 1.127032/24/201512/29/2016wvww-1.12703.exe149kbHP HP Compaq DC5850, Sony VPCF13DGX, IBM 8307SGY, Sony VGNFW590FPB, IBM 813135U, NEC VERSAL2100 RND41065495, Sony VGN-NW20EF_W, TYAN S2895, NEC PC-MK19ELZ2UFJG, NEC PC-GV32WSZE2, HP KY789AA-AKL p6175l, Packard Bell Ixtreme M5741, and more.
A4tech Op-50 740933/8/201512/27/2016a4tech_op-50-74093.exe170kbFujitsu FMVA56JWKS, Sony VGN-SZ780U, HP Pavilion dv1000, Lenovo 6457WTU, Compaq Presario 6266EA, Toshiba SATELLITE,A665, Lenovo ThinkPad SL510, IBM 8194D1G, Toshiba Dynabook T351/34CR, Gateway 4800 Series, Packard Bell IMEDIA 6460, LG E500-S.AP28P, Packard Bell ISTART 8401, Acer Veriton Z290G, RM Plc W761tg, HP PAVILION DV8000, Panasonic CF-19LCRDX6B, IBM 2668WCG, and more.
A4tech Op-50 227002/20/201512/29/2016a4tech_op-50-22700.exe83kbSony VGN-A197VP, Open Labs Neko/Miko, Gateway 7310MC, HP T3735tr-AB8 RR879AA, Sony VGN-FW56E, Fujitsu Amilo A1665G Series, Sony VGN-FW21L, Compaq BT466AA-ACJ CQ3211IX, Powerspec B651, Acer TravelMate 8531, LG N550-PE50K, NEC PC-VL750CS, Lenovo 3626AK4, VIA 7VTXH, and more.
A4tech Op-50 439801/23/201512/30/2016a4tech_op-50-43980.exe144kbCompaq AU852AA-ABM CQ5216LA, LG B75PS.AS5MB1D, Samsung SM50S, HP P8264A-ABF 761, AOpen MP65, HP HPE-420f, Compaq DC477A-ABA S3100NX NA111, HP HP Pavilion dv5 Notebook PC, HP HP Compaq 6710s, LG LS50-A514ZL, SIEMENS SIMATIC IPC647C PROFINET, HP 600-1210ch, ASUS ET2400IGTS-H61, TEKNOSERVICE TTL TEKNOPRO, Sony PCV-RZ104, LG R200-R.CP55R, IBM 8184RUM, NEC NEC VERSA ONE, and more.
A4tech Op-50 32941.110/20/201412/28/2016a4tech_op-50-32941.1.exe89kbFujitsu FMVNXA90N, LG R405-A, Lenovo 2718WLZ, SAMSUN NP-R510-FS04NL, Dell Vostro 1440, Acer Aspire L3600, Panasonic CF-52RE301QW, Lenovo ThinkPad X121e, IBM IBM System x3500 M4 Server -[7383E1G, Fujitsu FMVCE70L9, Lenovo 00P5095, Notebook W310CZ/CZ-T, and more.
A4tech Op-50 C420841/7/201512/29/2016a4tech_op-50-c42084.exe192kbASUS P5QPL-VM, SOTEC WG Series, IBM 2652GG4, Seneca T69968, Sony SVF1521R2EW, Panasonic CF-W7BWHAJS, ARCELIK 1PF-ANB 586D1 MT, Sony VGC-RB41P, HP NC214AA-UUW a6730sc, HP KE483AA-UUZ, Sony VGN-A197VP, and more.
A4tech Op-50 Y322231/13/201512/28/2016a4tech_op-50-y32223.exe147kbPanasonic CF-52JE202NW, LG E300-A.CB20A, IBM 8099KKB, Packard Bell EasyNote LS85, ASUS BP5275, NEC PC-LL750RG1B, Sony VGN-FS115ZR, NEC PC-MJ26EBZD1FSG, IBM 622142A, Acer Veriton M200-Q57, HP BT434AAR-ABA s5603w, HP HP G60 Notebook PC, NOVATECH A35FE/FB, NEC VERSAM350 NN942000802, and more.
A4tech Op-50 S2233312/22/201412/30/2016a4tech_op-50-s22333.exe129kbHP HP Pavilion dv9660 Notebook PC, IBM 8183Y59, Sony VGN-FW45MJ_B, ASUS F80S, Fujitsu FMVNA1S3E, HP FQ527AA-AB0 a6630tw, Compaq PE427A-ABU S7150UK GB420, HP FR378AA-ABH, EMachines Emachines D525, Panasonic CF-T8EWETZAM, Gigabyte P35-S3, LG P1-J555R, Fujitsu FMVNB75ST, MSI U4-7302, NEC PC-GV21YTZU6, LG R380-A.APC4BA3, Intel WIV68805-0052, and more.
A4tech Op-50 6098411/1/201412/30/2016a4tech_op-50-60984.exe112kbHP HP Pavilion dv6000, NEC PC-VT1000J6FD, GIADA GIADA, IBM 8187QG7, Compaq GU587AA-ABH SR5235NL, SIE 840_P3, Lenovo ThinkCentre M55e, Sony VGN-SZ1XP, HP HP MINI DM1-2010SO, HP RR460AA-ABF s7740.f, Lanix LANIX CORP 4080, Lenovo 57125694, and more.
A4tech Op-50 2.1043910/3/201412/27/2016a4tech_op-50-2.10439.exe26kbSony VGN-UX90PS, Dell Dimension 9100, LG R470-K.AR40KN, Compaq EK360AA-ABZ SR1659IT IT540, Acer Aspire M1850, Sony VGC-LA3, HP Pavilion ze4400, HP HP ProBook 5330m, NEC PC-VJ25AEZ78, Panasonic CF-S8HYEPDR, PCP+ G41 Xeon series, Intel GrossePoint, Dell Precision T5610, Panasonic CF-S9JYKADP, Dell Studio 1745, and more.
A4tech Op-50 E31.192.189/22/201412/29/2016a4tech_op-50-e31.192.18.exe27kbHP EP074AA-ABU, HP RS904AA-ACP, Panasonic CF-W7BWAZFBE, Sony VGN-CS160F, Lenovo ThinkCentre A63, IBM 8171ZCQ, Gigabyte 945GDS1, IBM 682466A, IBM 831136U, Toshiba SATELLITE C855-1QG, Sony VGN-NW120J, Compaq PW783AA-ACJ SR1425IL FD440, GIADA GIADA, HP AW010AAR-ABA p6210t, Sony VGC-LB92HS, Fujitsu FMVLX50WD, HP HPE-355uk, NEC VERSAE6301 RNF61119695, BenQ Joybook S32, and more.
A4tech Op-50 P6081.181/12/201512/27/2016a4tech_op-50-p6081.18.exe214kbHP ES131AA-UUZ, HP G6-1250se, Fujitsu FMVNFD80N, Compaq 5411EA 470029-828, IBM ThinkCentre M50, Gigabyte X58A-OC, HP FQ641AA-AC4 s3715b, IBM 6830TBG, Compaq GS367AA-AB4 SR5175CF, Toshiba Dynabook SS LX/190DR, Fujitsu FMVA42EWB, Compaq GU587AA-ABH SR5235NL, VIA KM400/A-823x, and more.
A4tech Op-50 71.104010/24/201412/30/2016a4tech_op-50-71.1040.exe115kbFujitsu FMVNFC50WG, HP HP ProBook 4421s, Sony PCG-FR295MP, IBM System x3630 M3 -[7377AC1, HP ED737AA-ABS, MouseComputer H87M-S01, NEC PC-VY20MAZ79, Foxconn AT-7000 Series, Fujitsu PRIMERGY TX140 S1, HP HP ProBook 6455b, HP PS304AA-ABH, EDsys EDSCADI73770, HP P6-2007nl, Lenovo ThinkCentre A55, Toshiba Libretto U100/190DSW, Acer Aspire 4925, and more.
A4tech Op-50 J61.142.1712/17/201412/28/2016a4tech_op-50-j61.142.17.exe102kbIBM 622133G, Toshiba SATELLITE C855-11C, Sony VPCF13FGX, Sony VPCJ126FJ, Supermicro C7Q67, Lenovo ThinkPad L530, Gateway DX441B, Wearnes Premiere 8550Le, Sony VPCL22AJ, MSI MS-16GN, MSW GmbH & Co. KG Intel DP55WB, LG P510-U.CP29E, and more.
A4tech Op-50 P402.1939/19/201412/27/2016a4tech_op-50-p402.193.exe219kbIntel WIV68105-0268, HP PS512AA-ABA a815, HP P6-2150jp, LG B50PS.AR5MB3E, NEC PC-VL750AS, Intel SBD2B014, HP KJ253AA-ABD, Sony VGC-JS94FS, ASUS L8400F series Notebook PC, WIPRO WSG48355W7-0023, MCJ W820Di1, IBM 8187SYU, Lenovo 6071W8L, HASEE U147, Acer TravelMate 5740G, Medion X781X/X782X, NEC PC-GL20ESYG5, and more.
A4tech Op-50 K2239310/26/201412/27/2016a4tech_op-50-k22393.exe147kbHP VD042AA-ABF p6105f, Sony VGN-SZ57SN_C, Sony VPCW12M1E, HP VG244AA-ABU p6235uk, IBM IBM System x3400 M2 Server -[783734G, LG P1-J555R, Toshiba Dynabook R731/36EBK, Toshiba Dynabook R822/WT9GS, Packard Bell EASYNOTE SW86, Lenovo 2689PHG, HP Pavilion ze4400, Sony PCV-RS221, Sony VGN-AR170P, Sony PCV-HS72B, LG LS50-AC6U1, and more.

Please Note: There are particular operating systems known to have problems with A4tech Op-50:
  • Windows XP Professional
  • Windows XP Media Center Edition 2003
  • Windows XP 64-bit Edition
  • Windows Vista Ultimate
  • Windows RT
  • Windows XP Starter Edition
  • Windows 7 Ultimate
  • Windows XP Home Edition, for home desktops and laptops
If you encounter problems with the direct download for these operating systems, please consult the driver download manager for the specific A4tech Op-50 model.
Laptop A4tech Op-50Tablet A4tech Op-50Download A4tech Op-50Upgrade A4tech Op-50Update A4tech Op-502017 A4tech Op-50Free A4tech Op-50Data A4tech Op-50Info A4tech Op-50Help A4tech Op-50Guide A4tech Op-50Comments A4tech Op-50Windows 10 A4tech Op-50Vista A4tech Op-50Windows 7 A4tech Op-50Install A4tech Op-50