4/27/2017 new driver models for direct download:1096
A4tech Op-20 5 stars review"The best driver WIKI ever! I wil keep coming back for sure."Eric Smalter, Boston, MA
Supported languages for A4tech Op-20
Certifications for A4tech Op-20
5 stars for A4tech Op-20 "WOW! Finally my PC got up to speed!" Melany Kim 7/18/2015

Checking...for 4/27/2017 Updates

All drivers on are updated on daily basis.

However, a new version of A4tech Op-20 might have been uploaded since our last site update.

A4tech Op-20 Driver Download

Windows Compatibility for A4tech Op-20 driver

A4tech Op-20 Driver Details:

A4tech Op-20 File Name:

A4tech Op-20 Driver Version: 643hW1

A4tech Op-20 ZIP Size: 115.kb

Manufacturer: A4tech

A4tech Op-20 was fully scanned at: 4/26/2017
Scan Status: driver download scanOK

A4tech Op-20 special revision for: Windows 10 64 bit, Windows XP Media Center Edition 64 bit, Windows Vista Business 64 bit, Windows Vista Enterprise (Microsoft Windows NT 6.0.6000.0) 32 bit, Windows XP Professional N 64 bit, Windows 7 Enterprise (Microsoft Windows NT) 64 bit, Windows 7 Home Premium 32 bit, Windows XP 64-bit Edition 64 bit, Windows 7 Starter 32 bit, Windows XP Media Center Edition 32 bit

A4tech Op-20 Download Stats:

Driver Uploaded: 4/1/2017

Direct Downloads: 6751
Most Recent Download: 4/26/2017
Managed Downloads: 2462
Most Recent Download: 4/24/2017
Download Mirrors: 3
Current Delay: 26 Seconds
Driver License: Free to the general public

Direct Download Success Stats:

Reports Issued By 5106/6751 Users

Success Reported By 1219/5106 Users

Driver Download Score69/100

Driver Installation Score72/100

Overall preformance Score64/100

A4tech Op-20 633 Thumbs Up633Thumbs
A4tech Op-20 131 Thumbs Down131Thumbs
A4tech Op-20 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 2346/2462 Users

Success Reported By 1966/2346 Users

Driver Download Score83/100

Driver Installation Score76/100

Overall preformance Score93/100

A4tech Op-20 1931 Thumbs Up1931Thumbs
A4tech Op-20 113 Thumbs Down113Thumbs
A4tech Op-20 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-20 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-20 + all other outdated drivers, and installs them all at once.

Please help us maintain a helpfull driver collection.
After downloading and installing A4tech Op-20, 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.

Other drivers most commonly associated with A4tech Op-20 problems:

A4tech Op-20 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-20 disfunctions.

Scan performed on 4/27/2017, Computer: HP NC684AAR-ABA A6750y

Outdated or Corrupted drivers:7/19

Device/DriverStatusStatus DescriptionUpdated By Scanner
Intel(R) 631xESB/6321ESB/3100 Chipset USB Universal Host Controller - 2688Up To Date and Functioning
Mice And Touchpads
A4Tech HID-compliant mouseUp To Date and Functioning
Usb Devices
Intel(R) Hub radice Intel(R) USB 3.0Up To Date and Functioning
Microsoft Standard erweiterter PCI-zu-USB universeller HostcontrollerCorrupted By A4tech Op-20
Sony Ericsson Mobile U8500 USB ROMCorrupted By A4tech Op-20
Sound Cards And Media Devices
Buffalo BUFFALO TV Tuner DT-T90/PCIEMW-TSOutdated
Network Cards
Realtek Realtek RTL8168B/8111B-Familie-PCI-E-Gigabit-Ethernet-NIC (NDIS 6.20)Up To Date and Functioning
Microsoft Keyboard Device FilterUp To Date and Functioning
Hard Disk Controller
NVIDIA NVIDIA MCP51 Serial ATA ControllerOutdated
Microsoft Texas Instruments PCI-xx21/xx11 CardBus Controller with UltraMediaCorrupted By A4tech Op-20
Intel Intel(r) AIM External TV Encoder Driver 0Up To Date and Functioning
Creaform NEC OHCI Compliant IEEE 1394 Host ControllerUp To Date and Functioning
Nokia Nokia C6-00 USB Phone ParentUp To Date and Functioning
Cameras, Webcams And Scanners
USB2.0 PC CAMERA Periferica video USBUp To Date and Functioning
Video Cards
Intel(R) 82945G Express Chipset Family (Microsoft Corporation - WDDM 1.0)Up To Date and Functioning
Input Devices
Eastern Times USB-HID (Human Interface Device)Outdated
Port Devices
PROLiNK PROLiNK UI AT Interface (COM7)Up To Date and Functioning
Sony Digital Flat Panel (1024x768)Up To Date and Functioning
Mobile Phones And Portable Devices
Acer NOKIACorrupted By A4tech Op-20

Scan performed on 4/27/2017, Computer: AOpen MP65

Outdated or Corrupted drivers:7/21

Device/DriverStatusStatus DescriptionUpdated By Scanner
ATK ATK0110 ACPI UTILITYUp To Date and Functioning
Mice And Touchpads
Microsoft Microsoft Express Mouse (Mouse and Keyboard Center)Corrupted By A4tech Op-20
VMware HID-compliant mouseCorrupted By A4tech Op-20
Synaptics Souris compatible PS/2Up To Date and Functioning
Usb Devices
Google AndroidUp To Date and Functioning
Sound Cards And Media Devices
Creative Sound Blaster X-Fi Xtreme AudioUp To Date and Functioning
Network Cards
Ralink Ralink RT5390R 802.11bgn Wi-Fi AdapterUp To Date and Functioning
Microsoft HID KeyboardOutdated
Hard Disk Controller
NVIDIA NVIDIA nForce 430/410 Serial ATA ControllerUp To Date and Functioning
Nokia Nokia E52 USB OBEXUp To Date and Functioning
Point Grey Research Texas Instruments OHCI-kompatibel IEEE 1394-vertskontrollerUp To Date and Functioning
Research In Motion BlackBerryUp To Date and Functioning
Nokia Nokia E52 USB PhonetUp To Date and Functioning
Texas Instruments Texas Instruments PCIxx12 Integrated FlashMedia ControllerUp To Date and Functioning
Nokia Nokia USB PhonetUp To Date and Functioning
Cameras, Webcams And Scanners
Canon CanoScan 3200/3200FOutdated
Video Cards
ATI ATI MOBILITY RADEON 9600/9700 SeriesUp To Date and Functioning
Input Devices
Wacom Wacom TabletCorrupted By A4tech Op-20
Port Devices
hspa Modem Application1 port (COM4)Corrupted By A4tech Op-20
Sony Digital Flat Panel (1024x768)Up To Date and Functioning
Mobile Phones And Portable Devices
Acer NOKIAOutdated
Driver ModelOriginal Upload DateLast ModificationDriver FileFile SizeCompatible Computer ModelsAvailabilty To Instalation Manager
A4tech Op-20 8341.11.11/6/201512/30/2016a4tech_op-20-8341.11.1.exe146kbNEC POWERMATE RD3911294AD, HP RR455AA-ABF t3727.f, Dell OptiPlex 330, Sony VPCW211AD, Fujitsu MS-6318, NEC VERSAE6200 RNC71101895, and more.
A4tech Op-20 1.10941.12/15/201512/29/2016a4tech_op-20-1.10941.1.exe27kbSony VGN-AR51J, IBM System x3650 M3 -[7945K4G, Fujitsu FMVNF50WWJ, Panasonic CF-53AACZYFT, IBM 26486G1, NEC PC-VY21MED5HJW6, HP EY906AA-ABZ, Sony VGN-NW235F, WIPRO WSG37455W7-0092, HP Pavilion ze4600, Toshiba TECRA A2, and more.
A4tech Op-20 I232.17411/20/201412/29/2016a4tech_op-20-i232.174.exe159kbFujitsu PRIMERGY TX150, IBM 621936U, IBM 8212K4U, Panasonic CF-72TCJWZPM, IBM 6830TBG, HP 810-019eb, IBM EServer xSeries 365 -[88625RX, Notebook MIM 2270, Fujitsu ESPRIMO Mobile X9515, Advent DT1404, Sony VGC-LT1S, Gigabyte H61M-USB3-B3, and more.
A4tech Op-20 O2.130883/9/201512/30/2016a4tech_op-20-o2.13088.exe58kbNEC EASYNOTE P910R00406, HP G5406f, MCJ AMIS, Toshiba SATELLITE C850-A791, Toshiba Dynabook Qosmio D710/T5BB, HP DV6 - 3206AX, Lenovo ThinkPad Edge E220s, HP ProLiant DL360 G3, IBM Eserver xSeries 235 -[8671KAX, Fujitsu FMVA42EWKS, Toshiba SATELLITE PRO C870-1C4, Clevo P15xEMx, IBM 8114WGZ, and more.
A4tech Op-20 2.1067411/14/201412/28/2016a4tech_op-20-2.10674.exe98kbToshiba Dynabook SS M41 200E/3W, IBM 187134M, SIEMENS SIMATIC IPC647C PROFINET, Anhoch Goliath XD810, SAMSUN R610, Olidata IPMIP-GS H57, ITSUMI ADAX, and more.
A4tech Op-20 X6020710/31/201412/27/2016a4tech_op-20-x60207.exe153kbMouseComputer H87M-S01, NOVATECH BB-4770C, Sony VGN-P50_G, Fujitsu FMVNT5FT4, Gigabyte S11M, Lenovo ThinkPad SL500c, IBM 2647LG7, HP DT180A-ABF t490.f, Fujitsu FMVCE80T7, and more.
A4tech Op-20 1.1247312/19/201412/27/2016a4tech_op-20-1.12473.exe185kbPackard Bell Imedia S3270, HP HP Compaq nx6325, ACTION MONTANA W7HP, Panasonic CF-30KCPRQAM, Supermicro X7DBP, HP GQ524AA-ABE, HP NC829AAR-ABA a6857c, and more.
A4tech Op-20 31.11.17012/12/201412/27/2016a4tech_op-20-31.11.170.exe47kbSony VPCEJ2S1R, Samsung SQ45S70S, MSI MS-6508, HP 23-b232e, Sony VPCM126AA, FIC ATM-Q45G, and more.
A4tech Op-20 83041.11/3/201512/27/2016a4tech_op-20-83041.1.exe124kbPackard Bell IMEDIA I4580 FR, Dell Vostro 1440, Compaq Presario 6330CA, Acer MX4SG-4DL, Lenovo ThinkPad T420s, Toshiba Satellite C870-DMK, Shuttle XG41, HP EG211AA-ABG m7288a, IBM 8212H1U, HP P6540d, and more.
A4tech Op-20 1.178311/7/201412/27/2016a4tech_op-20-1.1783.exe84kbCompaq PX734AA-ABA a123l NA520, ASUS PRDLS533, NOVATECH MBB-44308D, Panasonic CF-53JAWZYDE, Sony VGN-NS72JB_W, Toshiba SATELLITE PRO C50-A-1M3, Seneca PRO0542, IBM 2889CG6, Lenovo SS09302455, Gateway GT5418E, and more.
A4tech Op-20 C2.1042.198/27/201412/27/2016a4tech_op-20-c2.1042.19.exe107kbSony VGN-UX90S, LG LE50-23SK, Dedicated OEM-A4501-00, Packard Bell IPower I9810 GE, IBM 81712EU, HP P7-1012, Fujitsu FMVNFD75RG, Panasonic CF-52GCR42AG, HP HPE-420f, and more.
A4tech Op-20 H632608/30/201412/27/2016a4tech_op-20-h63260.exe78kbToshiba TECRA A2, HP BT597AA-ABA s5604f, Sony VPCF13WFX, HP HP nx9010, and more.
A4tech Op-20 801.19312/27/201412/29/2016a4tech_op-20-801.193.exe31kbSony VGN-FW17_B, MSI MS-6163, LG R590-PARU1BT, NEC PC-VW978WG01, Panasonic CF-Y2FW7AXS, Hercules EC-900, HP KX781AV-ABJ p6120jp, Sony VGN-TT46MG_B, and more.

Please Note: There are particular operating systems known to have problems with A4tech Op-20:
  • Windows XP Media Center Edition 2004
  • Windows Fundamentals for Legacy PCs
  • Windows Vista Starter
  • Windows XP Tablet PC Edition
  • Windows 7 Professional
  • Windows 10
  • Windows 7 Ultimate
If you encounter problems with the direct download for these operating systems, please consult the driver download manager for the specific A4tech Op-20 model.
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