1/18/2017 new driver models for direct download:833
A4tech Ok-521 5 stars review"The best driver WIKI ever! I wil keep coming back for sure."Eric Smalter, Boston, MA
Supported languages for A4tech Ok-521
Certifications for A4tech Ok-521
5 stars for A4tech Ok-521 "WOW! Finally my PC got up to speed!" Melany Kim 7/18/2015

Checking...for 1/18/2017 Updates

All drivers on are updated on daily basis.

However, a new version of A4tech Ok-521 might have been uploaded since our last site update.

A4tech Ok-521 Driver Download

Windows Compatibility for A4tech Ok-521 driver

A4tech Ok-521 Driver Details:

A4tech Ok-521 File Name:

A4tech Ok-521 Driver Version: 265P-eGNk

A4tech Ok-521 ZIP Size: 142.kb

Manufacturer: A4tech

A4tech Ok-521 was fully scanned at: 1/15/2017
Scan Status: driver download scanOK

A4tech Ok-521 special revision for: Windows 7 Starter 32 bit, Windows XP Media Center Edition 64 bit, Windows XP Media Center Edition 32 bit, Windows 7 Ultimate 64 bit, Windows XP Tablet PC Edition 64 bit, Windows XP Home Edition, for home desktops and laptops 64 bit, Windows XP 64-bit Edition 64 bit

A4tech Ok-521 Download Stats:

Driver Uploaded: 12/26/2016

Direct Downloads: 219
Most Recent Download: 1/16/2017
Managed Downloads: 2058
Most Recent Download: 1/16/2017
Download Mirrors: 5
Current Delay: 30 Seconds
Driver License: GPL

Direct Download Success Stats:

Reports Issued By 208/219 Users

Success Reported By 35/208 Users

Driver Download Score73/100

Driver Installation Score74/100

Overall preformance Score75/100

A4tech Ok-521 14 Thumbs Up14Thumbs
A4tech Ok-521 2 Thumbs Down2Thumbs
A4tech Ok-521 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 1801/2058 Users

Success Reported By 1466/1801 Users

Driver Download Score77/100

Driver Installation Score98/100

Overall preformance Score92/100

A4tech Ok-521 1437 Thumbs Up1437Thumbs
A4tech Ok-521 82 Thumbs Down82Thumbs
A4tech Ok-521 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 Ok-521 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 Ok-521 + all other outdated drivers, and installs them all at once.

Please help us maintain a helpfull driver collection.
After downloading and installing A4tech Ok-521, 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 Ok-521 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 Ok-521 disfunctions.

Scan performed on 1/18/2017, Computer: Sony VGN-AW220J

Outdated or Corrupted drivers:12/21

Device/DriverStatusStatus DescriptionUpdated By Scanner
Microsoft AMD-8131 HyperTransport(tm) IOAPIC-ControllerCorrupted By A4tech Ok-521
Mice And Touchpads
Microsoft Microsoft SideWinder X3 Mouse (IntelliPoint)Up To Date and Functioning
Usb Devices
Logitech Logitech USB Camera (HD Webcam C270)Up To Date and Functioning
Sound Cards And Media Devices
Intel(R) Intel(R) Display AudioCorrupted By A4tech Ok-521
Intel(R) High Definition Audio-apparaatCorrupted By A4tech Ok-521
Broadcom Audio Bluetooth.Up To Date and Functioning
Network Cards
Realtek Realtek RTL8168C(P)/8111C(P) Family PCI-E Gigabit Ethernet NIC (NDIS 6.0)Up To Date and Functioning
Microsoft Keyboard Device FilterOutdated
Hard Disk Controller
Intel Standaard Dual Channel PCI IDE ControllerOutdated
Acronis Seagate DiscWizard Image Backup Archive ExplorerCorrupted By A4tech Ok-521
Intel(R) Graphics Platform (SoftBIOS) DriverUp To Date and Functioning
Point Grey Research Texas Instruments OHCI-konformer IEEE 1394-HostcontrollerCorrupted By A4tech Ok-521
NEC Texas Instruments PCIxx12 Cardbus ControllerCorrupted By A4tech Ok-521
Intel Intel(r) AIM External TV Encoder Driver 4Corrupted By A4tech Ok-521
Nokia Nokia 5230 USB LCIFCorrupted By A4tech Ok-521
Cameras, Webcams And Scanners
Canon Canon MP160Outdated
Video Cards
Intel(R) 82945G Express Chipset Family (Microsoft Corporation - WDDM 1.0)Up To Date and Functioning
Input Devices
KME Periferica USB Human InterfaceUp To Date and Functioning
Port Devices
Sony Ericsson Sony Ericsson 750 USB WMC OBEX Interface (COM6)Corrupted By A4tech Ok-521
Sony Digital Flat Panel (1024x768)Up To Date and Functioning
Mobile Phones And Portable Devices
Acer NOKIAUp To Date and Functioning

Scan performed on 1/18/2017, Computer: HP GN634AV-ABA A6210

Outdated or Corrupted drivers:8/21

Device/DriverStatusStatus DescriptionUpdated By Scanner
Intel(R) G33/G31/P35 Express Chipset Processor to I/O Controller - 29C0Corrupted By A4tech Ok-521
Mice And Touchpads
ELECOM HID-compliant mouseCorrupted By A4tech Ok-521
Sentelic Finger Sensing PadUp To Date and Functioning
Microsoft Microsoft USB Compact Optical Mouse (IntelliPoint)Up To Date and Functioning
Usb Devices
Samsung CDC Abstract Control Model (ACM)Up To Date and Functioning
SafeNet SafeNet Inc. Hardlock KeyUp To Date and Functioning
Vimicro Periferica USB compositaUp To Date and Functioning
Sound Cards And Media Devices
DisplayLink DisplayLink USB Audio AdapterUp To Date and Functioning
ASUS USB Mass Storage DeviceUp To Date and Functioning
Broadcom Audio BluetoothUp To Date and Functioning
Network Cards
Intel(R) 82566DC-2 Gigabit Network ConnectionUp To Date and Functioning
Microsoft HID KeyboardCorrupted By A4tech Ok-521
Hard Disk Controller
Ricoh Ricoh xD-Picture Card ControllerUp To Date and Functioning
Nokia Nokia USB PhonetOutdated
AuthenTec TouchStrip Fingerprint SensorUp To Date and Functioning
Cameras, Webcams And Scanners
Canon Canon MP160Up To Date and Functioning
Video Cards
ATI RADEON X600 Series Secondary (Microsoft Corporation - WDDM)Corrupted By A4tech Ok-521
Input Devices
KME Dispositivo de interfaz humana USBCorrupted By A4tech Ok-521
Port Devices
hspa Modem Application2 port (COM5)Up To Date and Functioning
Sony Digital Flat Panel (1024x768)Corrupted By A4tech Ok-521
Mobile Phones And Portable Devices
Acer NOKIAOutdated
Driver ModelOriginal Upload DateLast ModificationDriver FileFile SizeCompatible Computer ModelsAvailabilty To Instalation Manager
A4tech Ok-521 22.1710/16/201412/29/2016m-22.17.exe75kbIBM 622351U, QUANMAX ChiliGREEN X7, GOLDENTEC UDP NAXOS-G74L, Compaq P2800N P170X520WC25EC, Lanix LANIX TITAN 3050 VER3, HP KJ381AA-A2L m9260f, Intel SBD2B014, Sony SVF14N15CLB, Panasonic CF-52GCR42AG, LG R580-G.BP21P1, Sony VGC-JS92JS, Toshiba Dynabook TX/66GPKJ, and more.
A4tech Ok-521 2.1072810/19/201412/28/2016a4tech_ok-521-2.10728.exe93kbHP H9-1090ch, HP 700-015eg, Toshiba Dynabook EX/35LWH, Compaq PN124AA-ABU SR1219UK GB440, Lenovo ThinkPad X61 Tablet, IBM 842777G, IBM System x3200 M3 -[7327PAA, Packard Bell IMEDIA 8006, AnabelleB Argyle V240, Toshiba SATELLITE C870D-10D, Fujitsu FMVA42EWKS, Toshiba Dynabook Qosmio T750/T8BS, HP EP245AA-ABU, CS&S Zenet, TCL N700, and more.
A4tech Ok-521 Z401.1389/12/201412/29/2016a4tech_ok-521-z401.138.exe175kbSony VPCEH40EBW, IBM 62253J9, Panasonic CF-W7DWJQJR, EVGA E679 0.0, Sony VGN-NW235F, Lenovo ThinkStation D30, NEC PC-VY25AAZR7, IBM 2668G7U, Toshiba Satellite C850-B820, HP RP847AA-ABZ, Sony VGN-TZ27FN, HP HP Pavilion TS 14 Notebook PC, Fujitsu FMV5NUBJH3, Sony VGX-X90P, Lenovo ThinkPad L412, HP HP Compaq nc6220, Lenovo 7659W29, Acer AS5732Z, HP HP ProBook 4530s, and more.
A4tech Ok-521 1.11.10869/19/201412/30/2016a4tech_ok-521-1.11.1086.exe65kbPanasonic CF-18KHHEBLL, HP HP Pavilion dv9500, Acer AcerPower 8000, HP ED713AA-ABF w5155.f, Acer Veriton X2631, Packard Bell OneTwo L3851, WIPRO WIV37455-0798, Sony VGX-TP1L, Clevo P15xEMx, Toshiba TECRA R10, HASEE U147, Intel C16, and more.
A4tech Ok-521 1.161.172/5/201512/30/2016a4tech_ok-521-1.161.17.exe197kbFujitsu FPC03080AL, Dell OptiPlex GX1 600L, Intel OLFV, Compaq KT580AA-A2L SR5548F, Fujitsu AMILO Li 2727, Acer A0A150, Toshiba Dynabook T350/36AB, Acer Veriton M200-Q57, HP PS225AA-ABE, Acer Acer 8935G, Fujitsu FMVL18B, MouseComputer Z68A-SD60, HP ER183AA-ABZ, Compaq FJ403AA-AB9 SR5502PT, WIPRO WIV37455-1090, Toshiba Dynabook EX1/524CDE, Packard Bell IMEDIA J9004, Lenovo ThinkCentre E51, Sony VGC-RT150DY, and more.
A4tech Ok-521 320861/20/201512/27/2016a4tech_ok-521-32086.exe151kbFujitsu FMVNB75ST, Acer Aspire 1601M, Toshiba Satego P100, HP RX889AAR-ABA a6040, Lanix LANIX CORP 4080, NEC PC-GL24ES8DE, EMachines 98.Y2D7Z.CF0, HP H9-1187, Anhoch Goliath XD605, Intel LC-92T10, and more.
A4tech Ok-521 8961/12/201512/28/2016a4tech_ok-521-896.exe64kbHP HP PAVILION DV6000, Lenovo ThinkPad T520, Sony VGN-FW43G_B, NEC EASYNOTE PB47Q01806, IBM 9210M43, Packard Bell Easynote sb86, IBM 26486G1, NEC PC-LS150LS1KSG, Panasonic CF-SX1WEUHR, Packard Bell EasyNote TK36, Acer Aspire 182dPTZ, Lenovo IdeaPad S10-3s, IBM ThinkPad X41 Tablet, HP HDX9300, HP KP266AA-ABZ, IBM 265244G, Sony VPC-M120AB, IBM 2658MJJ, Supermicro SYS-5017C-MF, and more.
A4tech Ok-521 X71.17421/11/201512/27/2016a4tech_ok-521-x71.1742.exe154kbHP Pavilion ze5600, Gateway Gateway M460, Sony SVP1322R4RBI, IBM 842777G, IBM 80847CG, Sony VGN-TZ330E, Sony VGN-AW25GJ_H, MSW GmbH & Co. KG Intel DP55WB, NEC PC-VL570AD, HP KY660AA-ABJ p6170jp, LG R480-L.AGC7BT, Packard Bell EasyNote_MX66, Acer TravelMate 8371, Samsung Q320/P320, Toshiba SATELLITE C850D-131, IBM 8123Q2B, ASUS W3A, and more.
A4tech Ok-521 31.12.1210/31/201412/27/2016a4tech_ok-521-31.12.12.exe182kbNEC PC-LL750GD1K, Sony VPCZ23M9E, HP PX568AA-ABY, Lenovo ThinkPad X1 Carbon, HP KT850AV-ABJ s3540jp, IBM 26478RG, Gigabyte GA-E7AUM-DS2H, Biostar TForce 550, HP KZ771AA-UUZ, LG RD405-A.CDT5A2, Panasonic CF-19KDRC66M, EMachines EL1332, Gateway P-6317 HSN, Foxconn A6GMV, HP HP Pavilion 11 x2 Notebook PC, LG E500-G.ABBTZ, IBM 6830TBG, Lenovo ThinkCentre M72z, and more.
A4tech Ok-521 42432.111/26/201412/30/2016a4tech_ok-521-42432.1.exe187kbIBM 8184W3Z, Packard Bell IPower J9000, HP HP ProBook 6445b, LG RD580-UAD18E, HP KN280AA-ABM s3410la, HP HP Compaq tc4400, HP RZ482AA-ABF m8090.f, Sony VPCEG26EG, HP HP Compaq nx6130, Sony SVE15138CGS, Toshiba Dynabook REGZA PC D731/T7DRS, IBM ThinkCentre M52, Compaq DD377A-ABX 6680 FI110, Gateway FX4710-UB802A, Sony VGN-NS10L_S, Compaq PX629AA-ABU SR1429UK GB520, and more.
A4tech Ok-521 81.130712/17/201412/30/2016a4tech_ok-521-81.1307.exe149kbECS HDC-I, AnabelleB Argyle M410, NEC PC-MY28VLZEDX8F, Matsonic MS9387E, HP 23-b232e, HP HP Compaq 6710b, LG E300-A.C4RRV, Lenovo ThinkPad SL500c, Lenovo 20B7S07L00, Sony VGN-FJ68SP_W, Biostar TP45 HP, Compaq DC477A-ABA S3100NX NA111, Toshiba Dynabook R732/E25HR, Lenovo 6069W1R, Lenovo ThinkPad L412, HP Pavilion dv4000, Acer Dalle, BenQ Joybook P51, and more.
A4tech Ok-521 1.11.12222/21/201512/29/2016a4tech_ok-521-1.11.1222.exe43kbFujitsu FMVA42EWKS, Toshiba Dynabook Qosmio T750/T8BS, HP EP245AA-ABU, CS&S Zenet, TCL N700, Sony VGN-FW12G_W, Transource Computer Systems, HP KB010AA-AKB a6330.cs, MouseComputer Z68A-SD60, NEC PC-MK31MEZCE, Fujitsu FMVNB16C, Advent DT2, HP P6-2463eo, HP RK570AAR-ABA m7760, Lenovo ThinkPad Edge E420, Acer Extensa 2900E, Lenovo 1S1680036940055, HP HP compaq nx4820, and more.
A4tech Ok-521 Eserver xSeries 335 -[8676LSX, Lenovo 7355W1J, HP KN280AA-ABM s3410la, FIC ATM-Q45G, Sony VGN-SR36GN_B, Compaq NP291AA-AB2 SR5837CX, Toshiba Dynabook SS RX2/T9J, HP VT626AA-AB1 HPE-170k, NEC PC-LL3508D, IBM ThinkCentre M52, Medion X781X/X782X, Acer Aspire 3810TZG, Packard Bell ISTART MC 9100 AIO EU, Sony VGN-TZ33_B, Sony VGN-BX94PS, HP HP Compaq 6000 Pro MT PC, Gigabyte P35-S3, and more.

Please Note: There are particular operating systems known to have problems with A4tech Ok-521:
  • Windows XP 64-bit Edition
  • Windows 7 Ultimate
  • Windows XP Media Center Edition
  • Windows Vista Enterprise (Microsoft Windows NT 6.0.6000.0)
  • Windows XP Starter Edition
  • Windows Vista Home Premium
  • Windows XP Tablet PC Edition
  • Windows XP Media Center Edition
If you encounter problems with the direct download for these operating systems, please consult the driver download manager for the specific A4tech Ok-521 model.
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