4/25/2017 new driver models for direct download:523
A4tech 0k-521 5 stars review"The best driver WIKI ever! I wil keep coming back for sure."Eric Smalter, Boston, MA
Supported languages for A4tech 0k-521
Certifications for A4tech 0k-521
5 stars for A4tech 0k-521 "WOW! Finally my PC got up to speed!" Melany Kim 7/18/2015

Checking...for 4/25/2017 Updates

All drivers on are updated on daily basis.

However, a new version of A4tech 0k-521 might have been uploaded since our last site update.

A4tech 0k-521 Driver Download

Windows Compatibility for A4tech 0k-521 driver

A4tech 0k-521 Driver Details:

A4tech 0k-521 File Name:

A4tech 0k-521 Driver Version: 6281U6M9X

A4tech 0k-521 ZIP Size: 129.kb

Manufacturer: A4tech

A4tech 0k-521 was fully scanned at: 4/20/2017
Scan Status: driver download scanOK

A4tech 0k-521 special revision for: Windows XP Tablet PC Edition 64 bit, Windows 8 Pro 32 bit, Windows 7 Professional 32 bit, Windows 7 Home Basic 32 bit, Windows XP Professional N 32 bit, Windows Vista Business 32 bit, Windows Vista Enterprise (Microsoft Windows NT 6.0.6000.0) 64 bit, Windows Vista Starter 64 bit, Windows 7 Ultimate 64 bit, Windows 10 64 bit, Windows XP Home Edition, for home desktops and laptops 32 bit, Windows 7 Starter 32 bit

A4tech 0k-521 Download Stats:

Driver Uploaded: 4/6/2017

Direct Downloads: 279
Most Recent Download: 4/24/2017
Managed Downloads: 4281
Most Recent Download: 4/23/2017
Download Mirrors: 2
Current Delay: 7 Seconds
Driver License: FS {free software}

Direct Download Success Stats:

Reports Issued By 211/279 Users

Success Reported By 44/211 Users

Driver Download Score72/100

Driver Installation Score73/100

Overall preformance Score61/100

A4tech 0k-521 23 Thumbs Up23Thumbs
A4tech 0k-521 5 Thumbs Down5Thumbs
A4tech 0k-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 3487/4281 Users

Success Reported By 2765/3487 Users

Driver Download Score91/100

Driver Installation Score81/100

Overall preformance Score95/100

A4tech 0k-521 2697 Thumbs Up2697Thumbs
A4tech 0k-521 156 Thumbs Down156Thumbs
A4tech 0k-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 0k-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 0k-521 + all other outdated drivers, and installs them all at once.

Please help us maintain a helpfull driver collection.
After downloading and installing A4tech 0k-521, or the driver installation manager, take a few minutes to send us a report:
* Only registered users can upload a report.

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Please register, and get one.

Other drivers most commonly associated with A4tech 0k-521 problems:

A4tech 0k-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 0k-521 disfunctions.

Scan performed on 4/25/2017, Computer: MIKROLOG S800SE-C6

Outdated or Corrupted drivers:7/22

Device/DriverStatusStatus DescriptionUpdated By Scanner
Panasonic Panasonic Misc DriverUp To Date and Functioning
Mice And Touchpads
(Standard mouse types) USB HID-compliant mouseCorrupted By A4tech 0k-521
Usb Devices
Microsoft Standard-USB-HubOutdated
Hewlett-Packard P1100 USB EWS Device DriverOutdated
Cambridge Silicon Radio Alps Bluetooth DeviceUp To Date and Functioning
Sound Cards And Media Devices
Realtek ATI HDMI AudioCorrupted By A4tech 0k-521
Analog Devices SoundMAX Integrated Digital AudioCorrupted By A4tech 0k-521
Intel Intel WiDi Audio DeviceUp To Date and Functioning
Network Cards
Ralink Dual Stream 802.11n Wireless LAN CardUp To Date and Functioning
Microsoft HID KeyboardUp To Date and Functioning
Hard Disk Controller
Toshiba TOSHIBA SD Memory Card DriveUp To Date and Functioning
Google Android ADB InterfaceUp To Date and Functioning
Nokia Nokia E52 USB LCIFUp To Date and Functioning
Intel(R) 82801EB Ultra ATA Storage Controllers - 24D1Up To Date and Functioning
Intel Intel(r) AIM External TV Encoder Driver 4Corrupted By A4tech 0k-521
Nokia Nokia 5230 USB OBEXUp To Date and Functioning
Cameras, Webcams And Scanners
Intel Canon EOS 500DUp To Date and Functioning
Video Cards
Intel(R) 82945G Express Chipset Family (Microsoft Corporation - WDDM 1.0)Up To Date and Functioning
Input Devices
Lenovo USB DeviceUp To Date and Functioning
Port Devices
hspa Modem Application1 port (COM4)Corrupted By A4tech 0k-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 4/25/2017, Computer: Fujitsu FMVA77HRG

Outdated or Corrupted drivers:9/18

Device/DriverStatusStatus DescriptionUpdated By Scanner
Intel(R) E7520 PCI Express Root Port C0 - 3599Corrupted By A4tech 0k-521
Mice And Touchpads
WheelMouse HID-compliant mouseUp To Date and Functioning
Synaptics Synaptics PS/2 Port TouchPadUp To Date and Functioning
Usb Devices
Philips Philips SPC530NC PC Camera; Composite A/V DeviceCorrupted By A4tech 0k-521
Genesys Logic USB-masslagringsenhetCorrupted By A4tech 0k-521
Sound Cards And Media Devices
NVIDIA NVIDIA GeForce GT 550MCorrupted By A4tech 0k-521
Network Cards
Realtek Realtek RTL8139 Family PCI Fast Ethernet NICOutdated
Microsoft Keyboard Device FilterCorrupted By A4tech 0k-521
Hard Disk Controller
Ricoh Ricoh xD-Picture Card ControllerCorrupted By A4tech 0k-521
AuthenTec Biometric CoprocessorUp To Date and Functioning
Texas Instruments Texas Instruments PCI-4510 CardBus ControllerUp To Date and Functioning
Broadcom ThinkPad Bluetooth 4.0Up To Date and Functioning
Cameras, Webcams And Scanners
Philips Philips SPC1030NC WebcamUp To Date and Functioning
Video Cards
ATI RADEON X600 Series (Microsoft Corporation - WDDM)Up To Date and Functioning
Input Devices
Logitech Logitech WingMan Digital DeviceCorrupted By A4tech 0k-521
Port Devices
D-Link USB Single PortUp To Date and Functioning
Sony Digital Flat Panel (1024x768)Outdated
Mobile Phones And Portable Devices
Acer NOKIAUp To Date and Functioning
Driver ModelOriginal Upload DateLast ModificationDriver FileFile SizeCompatible Computer ModelsAvailabilty To Instalation Manager
A4tech 0k-521 61.12.1079/22/201412/28/2016a4tech_0k-521-61.12.107.exe47kbNEC PC-VY20AED5MFA5, Gateway FX7029E, ASUS G750JW, Sony VGN-SZ1XP, HP RR861AA-ABD, Acer Aspire 1820PTZ, Lenovo ThinkPad R60e, HP P6772l, HP P6604f, MSI VR321, HP Pavilion dv6000, Fujitsu FMVU75HRG, and more.
A4tech 0k-521 M60392.112/30/201412/29/2016a4tech_0k-521-m60392.1.exe39kbHP HP Pavilion g7 Notebook PC, HP AY020AA-ABL p6320f, NOVATECH BB-4770C, HP HP Compaq nx9420, HP 23-f390, HP HP Compaq 6730b, Toshiba Satellite C850-B843, Gateway P-6318u HSN, Toshiba SATELLITE C855-1ME, Sony VGN-CS60B_Q, and more.
A4tech 0k-521 Q21.18899/26/201412/27/2016a4tech_0k-521-q21.1889.exe163kbSony VGN-CR363, Fujitsu ESPRIMO P2521, HP GX609AA-A2L m9160f, HP HP Pavilion dv8000, AT ALSEN, Toshiba Dynabook R822/WT9GS, LG R560-UAPW3E, IBM 2374E80, Fujitsu FMVNFB70BK, AnabelleB Graduate VA20, Sony VGN-NS52JB_P, Compaq PE427A-ABU S7150UK GB420, and more.
A4tech 0k-521 C61.131.102/7/201512/30/2016a4tech_0k-521-c61.131.10.exe153kbIBM 622133G, Samsung 400B4Z/A01TH, Dell Dimension 9100, HP GT690AA-AB4 IQ780d, and more.
A4tech 0k-521 24071/5/201512/29/2016-2407.exe24kbASUS BA5190,A500, HP GB290AA-AB5 m8088hk, HP HP Compaq 6710s, Lenovo 10245BG, HP S5-1217, NEC PC-VK22EAZHB, Compaq GM442AA-ABA SR5125CL, Fujitsu FMVNFD75B, Gateway FX540B, IBM 621936U, and more.
A4tech 0k-521 Y62201.110/25/201412/28/2016a4tech_0k-521-y62201.1.exe130kbNEC PC-VK25MXZCC, ASUS BP6260, Acer TravelMate 8372, Packard Bell OneTwo L3851, Gigabyte P35-S3G, NEC PC-MK29MLZDF, Panasonic CF-30F3SAXAM, HP VN465AA-UUW HPE-010sc, Toshiba SATELLITE U50-A, NEC PC-VK26TXZNG, Compaq GN666AA-ABM SG3102LA, and more.
A4tech 0k-521 2.1320310/18/201412/29/2016a4tech_0k-521-2.13203.exe114kbECS HDC-I, Toshiba Dynabook T552/36FWK, Compaq GN732AA-ABH SR5135NL, IBM ThinkCentre A51p, and more.
A4tech 0k-521 440493/7/201512/30/2016lmzsscy-44049.exe118kbSony VPCSB3AJ, HP HP Compaq 7900, ASUS W3A, HP RX889AAR-ABA a6040, Toshiba SATELLITE PRO C850-19G, and more.
A4tech 0k-521 8372.162/26/201512/27/2016a4tech_0k-521-8372.16.exe160kbHP Presario 2100, Fujitsu MS-6318, Fujitsu FMVXDE6K2Z, IBM 8183GNG, NEC PC-LL900BD, Sony VGN-NW235F, Lenovo 8927W1L, LG X200-NS5BK, Sony VGN-TZ36L_B, and more.
A4tech 0k-521 229799/24/201412/27/2016a-22979.exe192kbHP DT301A-ABM T450M, HP FL308AA-ABD IQ512de, Toshiba TECRA A2, NEC Express5800/TM700, Sony VGN-SR25T_P, HP 810-190jp, IBM 8115KUT, Lenovo ThinkPad T60p, Panasonic CF-51PFDDEBM, HP NY438AA-ABA p6115y, Sony VGN-CR260F, Panasonic FZ-G1AABJB1M, HP RZ412AA-ABZ, and more.
A4tech 0k-521 U2.11.170912/11/201412/29/2016a4tech_0k-521-u2.11.1709.exe138kbHP NC214AA-UUW a6730sc, LG LM60-15166L, Fujitsu LIFEBOOK NH532, HP ProLiant BL490c G7, and more.
A4tech 0k-521 1.1340810/3/201412/30/2016a4tech_0k-521-1.13408.exe85kbIBYTE UDP GN ANDROS-I60L, IBYTE Udp gn naxos-i1l, Lenovo ThinkPad T430, HP P8315A-ABZ 451, Gateway GT5042j, NEC PC-VY25AAZR7, Lanix LANIX CORP 4130, Fujitsu AMILO Li 2735, Gericom Phantom, Intel WIV68105-0268, Lenovo H520, Acer Aspire X1470, and more.
A4tech 0k-521 2.11.18491/10/201512/27/2016a4tech_0k-521-2.11.1849.exe98kbAT TRILINE PROFI I48, Fujitsu A6220, Lenovo ThinkPad X200, Fujitsu FMVCE70L9, Sony VGN-NW120D, NEC PC-VL750CS, NEC PC-MA30YMZEB, HP HP Compaq nx7400, HP HP Touchsmart 300-1120, Toshiba Dynabook T552/36HRJ, and more.

Please Note: There are particular operating systems known to have problems with A4tech 0k-521:
  • Windows 8 Enterprise
  • Windows XP Media Center Edition
  • Windows Vista Home Premium
  • Windows Vista Business
  • Windows Vista Home Basic
If you encounter problems with the direct download for these operating systems, please consult the driver download manager for the specific A4tech 0k-521 model.
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