4/24/2017 new driver models for direct download:679
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 4/24/2017 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: 4/21/2017
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: 3/18/2017

Direct Downloads: 259
Most Recent Download: 4/22/2017
Managed Downloads: 2442
Most Recent Download: 4/22/2017
Download Mirrors: 5
Current Delay: 9 Seconds
Driver License: GPL

Direct Download Success Stats:

Reports Issued By 200/259 Users

Success Reported By 26/200 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 1897/2442 Users

Success Reported By 1475/1897 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.

Other drivers most commonly associated with A4tech Ok-521 problems:

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 4/24/2017, Computer: Panasonic CF-S9LWGJDS

Outdated or Corrupted drivers:6/20

Device/DriverStatusStatus DescriptionUpdated By Scanner
Intel(R) 7 Series/C216 Chipset Family PCI Express Root Port 3 - 1E14Up To Date and Functioning
Mice And Touchpads
ELAN PS/2 Compatible MouseUp To Date and Functioning
Usb Devices
Intel(R) 7 Series/C216 Chipset Family PCI Express Root Port 4 - 1E16Corrupted By A4tech Ok-521
Hewlett-Packard HP Deskjet D2600 (DOT4USB)Up To Date and Functioning
Sound Cards And Media Devices
AMD AMD High Definition Audio DeviceUp To Date and Functioning
IDT High Definition Audio DeviceUp To Date and Functioning
Network Cards
Broadcom 2x2 11a/b/g/n Wireless LAN PCI Express Half Mini Card AdapterCorrupted By A4tech Ok-521
Microsoft HID KeyboardUp To Date and Functioning
Hard Disk Controller
Ricoh Ricoh xD-Picture Card ControllerCorrupted By A4tech Ok-521
Intel Intel(r) AIM External Flat Panel Driver 3Up To Date and Functioning
ACEECA Palm HandheldUp To Date and Functioning
NVIDIA Other PCI Bridge DeviceUp To Date and Functioning
Texas Instruments Dispositivo compatible con HIDUp To Date and Functioning
Toshiba Toshiba Secure Digital-HostcontrollerUp To Date and Functioning
Cameras, Webcams And Scanners
Canon CanoScan 3200/3200FOutdated
Video Cards
NVIDIA NVIDIA GeForce4 MX 440Corrupted By A4tech Ok-521
Input Devices
Logitech USB Input Device (Logitech Download Assistant)Up To Date and Functioning
Port Devices
D-Link USB Single PortUp To Date and Functioning
Sony Digital Flat Panel (1024x768)Up To Date and Functioning
Mobile Phones And Portable Devices
Acer NOKIAOutdated

Scan performed on 4/24/2017, Computer: Fujitsu FMVLX50LX

Outdated or Corrupted drivers:12/24

Device/DriverStatusStatus DescriptionUpdated By Scanner
Apple Apple iSightUp To Date and Functioning
Mice And Touchpads
Microsoft Microsoft Serial BallPointCorrupted By A4tech Ok-521
VMware VMware USB Pointing DeviceUp To Date and Functioning
NEC VersaGlideCorrupted By A4tech Ok-521
Usb Devices
Hewlett-Packard HP Officejet 6500 E710a-f (REST)Outdated
NEC RATOC PCI USB Enhanced Host ControllerOutdated
Sound Cards And Media Devices
NVIDIA NVIDIA GeForce GT 635MUp To Date and Functioning
NVIDIA NVIDIA GeForce GT 550MCorrupted By A4tech Ok-521
NVIDIA NVIDIA HDMI AudioCorrupted By A4tech Ok-521
Network Cards
Atheros Atheros L1 Gigabit Ethernet 10/100/1000Base-T ControllerUp To Date and Functioning
Microsoft HID KeyboardOutdated
Hard Disk Controller
ATI ATI PCI IDE Bus Master ControllerUp To Date and Functioning
Unibrain OHCI Compliant IEEE 1394 Host ControllerCorrupted By A4tech Ok-521
Texas Instruments Texas Instruments PCIxx12 Integrated FlashMedia ControllerCorrupted By A4tech Ok-521
Western Digital WD SES Device USB DeviceCorrupted By A4tech Ok-521
Mad Catz Programmable Support for MouseUp To Date and Functioning
Datel Design & Development DSi AR HW ProgUp To Date and Functioning
ENE ENE CB1410 Cardbus ControllerCorrupted By A4tech Ok-521
Cameras, Webcams And Scanners
Philips Philips SPC1030NC WebcamUp To Date and Functioning
Video Cards
ATI ATI MOBILITY RADEON 9600/9700 SeriesUp To Date and Functioning
Input Devices
KME USB-brugerstyret inputenhed (HID)Corrupted By A4tech Ok-521
Port Devices
Sony Ericsson Sony Ericsson 750 USB WMC OBEX Interface (COM6)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 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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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