3/28/2017 new driver models for direct download:1029
A4tech Rfkb-21 5 stars review"The best driver WIKI ever! I wil keep coming back for sure."Eric Smalter, Boston, MA
Supported languages for A4tech Rfkb-21
Certifications for A4tech Rfkb-21
5 stars for A4tech Rfkb-21 "WOW! Finally my PC got up to speed!" Melany Kim 7/18/2015

Checking...for 3/28/2017 Updates

All drivers on are updated on daily basis.

However, a new version of A4tech Rfkb-21 might have been uploaded since our last site update.

A4tech Rfkb-21 Driver Download

Windows Compatibility for A4tech Rfkb-21 driver

A4tech Rfkb-21 Driver Details:

A4tech Rfkb-21 File Name:

A4tech Rfkb-21 Driver Version: 931kgDS0

A4tech Rfkb-21 ZIP Size: 121.kb

Manufacturer: A4tech

A4tech Rfkb-21 was fully scanned at: 3/26/2017
Scan Status: driver download scanOK

A4tech Rfkb-21 special revision for: Windows 8 Pro 64 bit, Windows 7 Professional 32 bit, Windows Vista Home Premium 64 bit, Windows 7 Service Pack 1 (Microsoft Windows NT) 32 bit, Windows XP Tablet PC Edition 32 bit, Windows 7 Ultimate 64 bit, Windows 7 Enterprise (Microsoft Windows NT) 64 bit

A4tech Rfkb-21 Download Stats:

Driver Uploaded: 3/17/2017

Direct Downloads: 326
Most Recent Download: 3/27/2017
Managed Downloads: 2927
Most Recent Download: 3/25/2017
Download Mirrors: 5
Current Delay: 25 Seconds
Driver License: Free

Direct Download Success Stats:

Reports Issued By 285/326 Users

Success Reported By 33/285 Users

Driver Download Score67/100

Driver Installation Score70/100

Overall preformance Score60/100

A4tech Rfkb-21 4 Thumbs Up4Thumbs
A4tech Rfkb-21 0 Thumbs Down0Thumbs
A4tech Rfkb-21 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 2884/2927 Users

Success Reported By 2707/2884 Users

Driver Download Score86/100

Driver Installation Score88/100

Overall preformance Score89/100

A4tech Rfkb-21 2585 Thumbs Up2585Thumbs
A4tech Rfkb-21 69 Thumbs Down69Thumbs
A4tech Rfkb-21 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 Rfkb-21 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 Rfkb-21 + all other outdated drivers, and installs them all at once.

Please help us maintain a helpfull driver collection.
After downloading and installing A4tech Rfkb-21, 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 Rfkb-21 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 Rfkb-21 disfunctions.

Scan performed on 3/28/2017, Computer: NEC PC-GV30H2ZG3

Outdated or Corrupted drivers:7/18

Device/DriverStatusStatus DescriptionUpdated By Scanner
Intel(R) processor PCI Express Root Port - 0041Up To Date and Functioning
Mice And Touchpads
Microsoft Microsoft USB Basic Optical Mouse (IntelliPoint)Corrupted By A4tech Rfkb-21
Logicool Logitech USB TrackMan WheelCorrupted By A4tech Rfkb-21
Logicool Logitech USB TrackMan WheelUp To Date and Functioning
Usb Devices
AMD Standard erweiterter PCI-zu-USB universeller HostcontrollerUp To Date and Functioning
Sound Cards And Media Devices
AVerMedia AVerMedia A350 MiniCard Hybrid ATSC TVUp To Date and Functioning
Network Cards
VIA VIA Rhine II Fast Ethernet AdapterOutdated
Microsoft Keyboard Device FilterUp To Date and Functioning
Hard Disk Controller
Intel Intel(r) 82801AA Bus Master IDE ControllerUp To Date and Functioning
Nokia Nokia USB PhonetCorrupted By A4tech Rfkb-21
Creaform NEC OHCI Compliant IEEE 1394 Host ControllerUp To Date and Functioning
SMSC SMSC IrCC - Fast Infrared PortCorrupted By A4tech Rfkb-21
Cameras, Webcams And Scanners
SunplusIT HD WebcamUp To Date and Functioning
Video Cards
Intel Video Controller (VGA Compatible)Up To Date and Functioning
Input Devices
Lenovo Lenovo USB Optical Wheel Mouse (HID)Up To Date and Functioning
Port Devices
ONDA ONDA USB Enumerator For AT DeviceUp To Date and Functioning
Sony Digital Flat Panel (1024x768)Outdated
Mobile Phones And Portable Devices
Acer NOKIACorrupted By A4tech Rfkb-21

Scan performed on 3/28/2017, Computer: IBM 62237BU

Outdated or Corrupted drivers:5/21

Device/DriverStatusStatus DescriptionUpdated By Scanner
Intel Xeon(R)-Prozessor E3-1200 v2/Core-Prozessor der dritten Generation - PCI Express-Stammport - 0151Up To Date and Functioning
Mice And Touchpads
Wacom Wacom Mouse MonitorCorrupted By A4tech Rfkb-21
Synaptics PS/2 Compatible MouseUp To Date and Functioning
Microsoft Microsoft USB IntelliMouseUp To Date and Functioning
Usb Devices
Microsoft USB-lagerenhedUp To Date and Functioning
Intel(R) USB 2.0 HubUp To Date and Functioning
Sound Cards And Media Devices
Realtek Periferica audio su bus High Definition AudioUp To Date and Functioning
DisplayLink Lenovo USB AudioUp To Date and Functioning
NVIDIA NVIDIA HDMI AudioUp To Date and Functioning
Network Cards
Intel(R) PRO/1000 CT Network ConnectionUp To Date and Functioning
Microsoft Keyboard Device FilterOutdated
Hard Disk Controller
Intel(R) 82801DBM Ultra ATA Storage Controller - 24CACorrupted By A4tech Rfkb-21
Nokia Nokia 5230 USB LCIFUp To Date and Functioning
Nokia Nokia C6-00 USB OBEXCorrupted By A4tech Rfkb-21
Intel HID Sensor CollectionUp To Date and Functioning
Cameras, Webcams And Scanners
Importek USB Composite DeviceUp To Date and Functioning
Video Cards
ATI RADEON X300 SeriesUp To Date and Functioning
Input Devices
Microsoft HID-compliant system control deviceUp To Date and Functioning
Port Devices
Huawei HUAWEI Mobile Connect - USB Device (COM8)Up To Date and Functioning
Sony Digital Flat Panel (1024x768)Corrupted By A4tech Rfkb-21
Mobile Phones And Portable Devices
Acer NOKIAUp To Date and Functioning
Driver ModelOriginal Upload DateLast ModificationDriver FileFile SizeCompatible Computer ModelsAvailabilty To Instalation Manager
A4tech Rfkb-21 2.1290412/7/201412/30/2016a4tech_rfkb-21-2.12904.exe92kbDell Inspiron N5040, Compaq KJ172AA-AB4 SR5272CF, HP Compaq nx9040, Sony VPCM126AA, Gigabyte H61M-USB3-B3, Panasonic CF-R8EWBAAP, ECS 332, LG A510-U.AESGE2, Gateway M-7332H, IBM IBM eServer 206m -[848510U, HP PX581AA-ABE, Sony VGN-FW36GJ, LG R490-KR7WK, Dell PowerEdge R220, HP Presario V5000, IBM ThinkPad G40, and more.
A4tech Rfkb-21 2.1082.149/25/201412/30/2016a4tech_rfkb-21-2.1082.14.exe116kbT-Systems T-Systems PC P4PE, Fujitsu PRIMERGY RX200 S8, Sony VGN-FS755FP, Lenovo 6075Y74, NEC PC-LL550KG1J, HP HP Compaq nc4010, HP GU631AA-UUW, KOHJINSHA APERA Series, Acer Aspire 8730G, Packard Bell IMEDIA MC 8830, HP NY584AA-AC4 600-1010b, Toshiba SATELLITE C850-A791, HP PX568AA-ABY, and more.
A4tech Rfkb-21 31.17729/26/201412/29/2016a4tech_rfkb-21-31.1772.exe47kbToshiba SATELLITE C850-A819, HASEE U147, Toshiba Dynabook T553/37JWB, Dell Latitude 131L, Packard Bell EasyNote TM01, Gateway FX4710-UB802A, LG LS75-26SLCE1, Fujitsu LIFEBOOK S 7020, Fujitsu LifeBook A6030, Acer A7600U, Fujitsu CELSIUS M730powe, HP P6-2018es, and more.
A4tech Rfkb-21 L32232.12/17/201512/30/2016a4tech_rfkb-21-l32232.1.exe108kbFujitsu FMVXD4VR2Z, CDM K9A2VM-FD R01, Lenovo ThinkPad X220 Tablet, LG R590-PR70K, ARLT Computer Produkte Mr. Gamer 7-11 R2, HP FK785AAR-ABA s3620f, Daewoo CT7150, Panasonic CF-W2FWPAXP, Sony VGN-SR36GN_B, Compal DL7x, Packard Bell IMEDIA 6430, and more.
A4tech Rfkb-21 G636802/13/201512/28/2016a4tech_rfkb-21-g63680.exe102kbZoostorm 7010-0246A, Lenovo 1S16800336100W2, LG R580-UP87K, Buympc TRANSPORT T2500 154 E, Compaq DT260A-ABU S5210UK GB340, Fujitsu FMVL18B, HP Presario C500, HP HP Compaq Presario CQ61, Fujitsu FMVNFD85D, HP 100-6100BR, EDsys EDSCADI73770, Compaq EJ284AA-ABF SR1622FR FR540, IBM PHILIPS, and more.
A4tech Rfkb-21 2002312/18/201412/27/2016a4tech_rfkb-21-20023.exe103kbHP D5468AT-ABA GX768AA, Extracomputer D2312-C2, HP HP Compaq dc5100 SFF, Compaq DB266A-AB1 6215KR KO910, Packard Bell ISTART 9112, IBM 1871Y16, Itautec Infoway w7730, Fujitsu FMV8NU1LC5, ICP / IEi KINO-945GSE, HP VN465AA-UUW HPE-010sc, Sony VGN-TZ17TN_N, Clevo W240BL_W250BZ_W270BZQ, WIPRO WSG48355W7-0023, HP P8652A-ABF 722, LG P100-S.AB09E, HP KJ401AA-aba A6437C, Lenovo 19514ZU, HP RR496AA-ABU, Fujitsu FMVNFB60K, and more.
A4tech Rfkb-21 2227310/5/201412/29/2016pibdzj-22273.exe36kbHP 600-1390, Extracomputer D3230-B1, HP HP Compaq nc4200, Packard Bell IXtreme J8038, IBM ThinkCentre A51, IBM ThinkPad T40, ASUS BA5190, Compaq GU587AA-ABH SR5235NL, APC4R APC4R116, Sony VGN-NW20EF_W, LG Z1-B821P1, Gateway E-5200, HP HP EliteBook 6930p Notebook PC, HP PN113AA-ABF t790.f, and more.
A4tech Rfkb-21 V41.108210/10/201412/27/2016a4tech_rfkb-21-v41.1082.exe126kbSony VPCF13S8R, VIA VT8367-8233/5, IBM ThinkPad R52, Compaq GN732AA-ABH SR5135NL, Toshiba Dynabook Qosmio F30/770LS, LG LW70-JJKG, HP PC106A-ABA a610, HP Compaq nx5000, Compaq PN182AA-ABS SR1210SF EL440, HP NY438AA-ABA p6115y, IBM 622142A, IBM 8184NUG, HP D7217M-ABA 533, HP HP Compaq nc6110, and more.
A4tech Rfkb-21 2.1393310/17/201412/29/2016rxmepcw-2.13933.exe144kbLenovo ThinkStation S20, HP 500-018es, NEC PC-MJ29MLZ2JCSG, M&A E10IS, NEC PC-MY24RAZ75, HP GP G62-A20SY NB, Fujitsu LIFEBOOK NH532, Buympc DES0024C USCG ClientPro 375 G, Lanix BRAIN 4140, Panasonic CF-Y8FW8CJS, HP NC684AAR-ABA a6750y, WIPRO WNB7PBM5100K-0004, ByteSpeed BYTESPED, Sony VOA, and more.
A4tech Rfkb-21 99410/23/201412/29/2016a4tech_rfkb-21-994.exe90kbSony VGN-NR270N, Gigabyte EP41-US3L, VIA VT8653-8233, Toshiba Dynabook T552/36HRJ, Fujitsu CELSIUS H265, HP NC684AAR-ABA a6750y, HP NY584AA-AC4 600-1010b, HP GN551AAR-ABA m8200, IBM 622564G, HP HP Pavilion DV9000, HP HP ProBook 6555b, ADVANC Modelo_A, and more.
A4tech Rfkb-21 61.10679/14/201412/27/2016a4tech_rfkb-21-61.1067.exe72kbSAMSUN R509, Acer Aspire 5710Z, HP Rfrb h8-1100z, Sony VGNZ890G, Sony VPCCW21FD, Fujitsu FMVNFC50WG, Acer ATC-603, Panasonic CF-T1RCAXR, HP CQ2803EDm, Lenovo ThinkCentre A60, HP NC133AA-AKB m9561cs, and more.
A4tech Rfkb-21 D7071.1212/8/201412/29/2016a4tech_rfkb-21-d7071.12.exe186kbHP NY584AA-AC4 600-1010b, Toshiba SATELLITE C850-A791, HP PX568AA-ABY, Fujitsu FMVXN2G52, Acer MX4SG-4DL, NEC PC-GV286VZAU, DataLogic MS-N011, APC4R APC4R116, HP Compaq nx9020, ECS P55H-A SLI, HP Pavilion dv2854ca, Lenovo ThinkCentre M75e, LG R590-XR7WK, and more.
A4tech Rfkb-21 30021.110/25/201412/30/2016a4tech_rfkb-21-30021.1.exe99kbIBM 8213WCM, NEC PC-VL500ED, Compaq RF785AA-ABU SR2029 NA100, LG R580-UAAD6BT, Lenovo 2756AF8, RM Plc RM DESKTOP 201, Panasonic CF-W7DWM07JM, Panasonic CF-N9LWRJDS, Toshiba Dynabook SS LX/190DK, Sony VGN-NS160D, NEC PC-VW970BS, Toshiba SATELLITE C850-A798, Panasonic CF-53AACZYFT, HP HP Pavilion dv2700, AT PC ALZA, Sony VPCF13DGX, Roemer KW28/2007, HP NM943AA-UUW m9570, NEC PC-VL750CS, and more.
A4tech Rfkb-21 81.12.1748/28/201412/29/2016a4tech_rfkb-21-81.12.174.exe189kbToshiba SATELLITE C855-1X3, Packard Bell IMEDIA D5089 BE, Lenovo 6483WNQ, Packard Bell TS44HR, Fujitsu AMILO Xi 2528, Sony VGN-FE52B_H, Sony VNG-FE25TP, Infoquest QuestPC, HP HP Compaq nw8440, IBM IBM System X3100 M4 -[2582K1G, Compaq PW679AA-ABE SR1377ES ES510, HP HP Compaq nw8440, and more.
A4tech Rfkb-21 W1.1303312/25/201412/30/2016a4tech_rfkb-21-w1.13033.exe165kbHP 610-1130uk, WIPRO WSG37425V-0038, Toshiba SATELLITE C850-1C4, IBYTE UDP GN ANDROS-I60L, Sony VGN-NS11SR_S, Sony VGN-FJ22B_R, HP KB003AA-B14, Toshiba SATELLITE C850-16W, LG A540-D, Acer ATC-603, HP HP Compaq nc6220, NEC PC-GL20ES3L6, Foxconn AT-7000 Series, HP 23-f390, IBM ThinkCentre M50, Lenovo 3000 J200 Desktop, HP GU622AA-ABE, NEC PC-VY22SRFEJEUL, and more.
A4tech Rfkb-21 2341.1312/10/201412/29/2016-2341.13.exe48kbAcer P4LJ0, Fujitsu FMVNF50WWJ, Dell Inspiron N4050, HP EP086AA-ABS, Sony VOA, HP HP Pavilion dv5000 ES248EA#ABD, Packard Bell EASYNOTE SW86, Toshiba Dynabook AX/3527CMSB, HP GX611AA-ABA m8300f, NEC PC-MY28VLZEJ, MiTAC 9525, IBM 8099KKB, NEC PC-GL20ES3L6, and more.
A4tech Rfkb-21 830679/19/201412/30/2016a4tech_rfkb-21-83067.exe184kbHP A0316001, WIPRO WNBOBM4930-EK-0015, Lenovo ThinkCentre Edge 71, HP Vd019aar-UUW, HP 1618, IBM ThinkPad R32, Gateway MD7321U, Seneca Pro86308, Cybernet Manufacturing CyberMed N19, Fujitsu FMVNS8AE, Sony Vgn-sz483, Toshiba SATELLITE C870-162, Positivo POS, NEC PC-VT5500D, HP PX581AA-ABE, Sony SVE1411E1RB, IBM 814338G, Lenovo ThinkPad Edge E431, Fujitsu FMVMGG70N7, and more.
A4tech Rfkb-21 372711/20/201412/27/2016a4tech_rfkb-21-3727.exe71kbSony VPCF135FG, IBM IBM System x3200 M2 -[643217G, Packard Bell ISTART 8401, Sony VPCSA4AGX, Sony VGN-FW36GJ, IBM 1872W5A, NEC PC-LL750NSB-YC, Fujitsu ESPRIMO Mobile X9510, Fujitsu FMVNFB70RG, Toshiba SATELLITE S50D-A-10H, Sony VGN-SR390J, HP HP Compaq nc6000, ASUS 1015T, and more.
A4tech Rfkb-21 861/7/201512/29/2016a4tech_rfkb-21-86.exe67kbCompaq Presario 6330CA, Acer TravelMate 5740G, Panasonic CF-W2FWPAXP, INVESTRONICA PTC-Q965, Panasonic CF-52RE401QW, AT TRILINE PROFI I48, HP VG244AA-ABU p6235uk, Lenovo 6463WSS, HP XXX, LG Z20NQ.AS57B2E, Compaq EC537AA-ABZ SR1549IT IT530, ARCELIK 1UU-ANB 586 A2MT, and more.
A4tech Rfkb-21 2.1272212/25/201412/29/2016a4tech_rfkb-21-2.12722.exe116kbHP GX709AA-ABM s3310la, MIKROLOG ProG33-CH, Sony VGN-TZ35FN, HP HPE-280jp, HP VG133AA-B14 p6120be, Sony VPCF136FX, DakTech DTGM5, IBM 9210M43, MSI MS-6163, Packard Bell ISTART 2234, Lenovo SS09355260, LG GS50-5FH1, IBM IBM System x3100 M4 -[258242Z, HP Pavilion zd7000, Sony VGN-FW140AE, HP AX685AA-ABJ 300-1150jp, HP HP Compaq nc6000, and more.
A4tech Rfkb-21 7392.141/12/201512/27/2016a4tech_rfkb-21-7392.14.exe148kbHP PG129AA-UUZ, Seneca Pro64601, Lenovo SS09221149, Sony VGN-SZ7AWN_C, Samsung SM50S, Toshiba Dynabook Satellite J62 166D/5X, Toshiba PSC0SE-02E21EFR, Compaq P8654S-ABA S3000V NA110, MSI GT60 2OJWS, Toshiba SATELLITE C855-2L1, HP P8264A-ABF 761, and more.
A4tech Rfkb-21 4337910/3/201412/28/2016dzyqyij-43379.exe25kbFujitsu CELSIUS M730powe, HP P6-2018es, Toshiba SATELLITE L850-153, Fujitsu FMVXD0AH2Z, Sony VGN-AW25GJ_H, Fujitsu FMVA54EW, Sony VGX-TP1E, HP HP ProBook 4730s, Supermicro X9DRL-7F, NEC PC-VY25AAZR7, Intel GrossePoint, Intel S3420GPC, HP G5350nl, Lenovo 00P3799, Fujitsu FMVXNBGJ2Z, ARCELIK 1UU-ANB 586 A2MT, Fujitsu LIFEBOOK U574, IBYTE UDP GN ANDROS-I36L, and more.
A4tech Rfkb-21 41.19982/16/201512/28/2016a4tech_rfkb-21-41.1998.exe197kbSony VGN-FJ90S, HP Compaq nx9110, Sony VGC-JS53FB_P, HP KE530AA-ABD a6212de, HP PW689AA-ABS D4085.SE, Compaq RC635AA-ABF SR191FR FR630, HP P6562es, SAMSUN N250P, IBM 8305VBG, Lenovo ThinkPad T530i, Sony VPCEB13FG, Acer A7600U, LG E300-A.C28BC1, HP HP Pavilion dv2700 Notebook PC, HP 23-b030ef, and more.
A4tech Rfkb-21 C1.1231.172/27/201512/30/2016a4tech_rfkb-21-c1.1231.17.exe70kbIBM 8215VFZ, IBM ThinkPad X41, Lenovo ThinkCentre E51, Intel SE7505VB2, Toshiba SATELLITE C55-A-10Q, HP KZ758AA-ABU, HP HP nx9000, Acer Aspire 1520, Sony VPCEC2E9E, Sony VGN-CS160F, Clevo W870CU, Sony PCV-RS221, MSI MS-6508, Sony VGN-CR21S_P, Sony VGC-JS52JB_S, ASUS K52JT, and more.
A4tech Rfkb-21 21.182.1711/7/201412/30/2016a4tech_rfkb-21-21.182.17.exe75kbHP Presario 2500, HP 310-1210es, Sony VGN-BZ13XN, HP FQ553AA-ABA a6608f, HP Compaq nx9040, Toshiba Dynabook TX/67J2PKYD, NEC PC-MY26XHZE1, Compaq GN732AA-ABH SR5135NL, Intel GrossePoint, Lenovo ThinkCentre M92p, and more.
A4tech Rfkb-21 C61.11.1761/21/201512/28/2016-c61.11.176.exe148kbHP PW579AA-ABG m7088a, Toshiba NB100, NEC PC-MY18ABZE4, HP P7-1106, Sony VGN-NS31ST_S, Dimotion PCDBS44H, Gateway J2924, Acer NC-V5-531-10076G50MASS, HP HP PAVILION DV6000, Lenovo 10AH0016US, HP CQ1160FRm, IBM 81387HG, HP S5-1028hk, and more.
A4tech Rfkb-21 I308343/4/201512/27/2016a4tech_rfkb-21-i30834.exe110kbOlidata H8DA8/H8DAR, SIEMENS MC PC BOX V5 CPB, HP Pavilion ze8500, WIPRO WNBOBM4930-EK-0015, HP HP ProBook 4510s, I.C.S Olivetti MK510, Positivo POS, HP ES131AA-UUZ, Samsung N130, SAMSUN R509, Toshiba Satellite C850-F0202, HP P6-2006es, Anhoch Goliath XD630, Acer A7600U, Toshiba Dynabook T350/34BBM, HP KT316AA-ABE, and more.
A4tech Rfkb-21 Z731.10012/8/201412/29/2016a4tech_rfkb-21-z731.100.exe109kbHP FQ562AA-A2L m9500f, IBM IBM System x3100 -[434842X, Gateway GZ7108TV, Sony VPCCW2VFX, Toshiba Satellite T130-11U, Lenovo ThinkPad X300, ECS M916, Panasonic CF-30CWQAZBM, NEC DT000024, HP RZ482AA-ABF m8090.f, WIPRO WSG68B55W7-0009, Fujitsu FMVF58CMW, Dimotion PCDO5V3, Sony VGN-NS190J, Sony SVS1312AJA, Sony VGC-RM75UD, and more.

Please Note: There are particular operating systems known to have problems with A4tech Rfkb-21:
  • Windows 10
  • Windows XP Media Center Edition 2003
  • Windows RT
  • Windows 7 Starter
  • Windows Vista Ultimate
  • 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 Rfkb-21 model.
Laptop A4tech Rfkb-21Tablet A4tech Rfkb-21Download A4tech Rfkb-21Upgrade A4tech Rfkb-21Update A4tech Rfkb-212017 A4tech Rfkb-21Free A4tech Rfkb-21Data A4tech Rfkb-21Info A4tech Rfkb-21Help A4tech Rfkb-21Guide A4tech Rfkb-21Comments A4tech Rfkb-21Windows 10 A4tech Rfkb-21Vista A4tech Rfkb-21Windows 7 A4tech Rfkb-21Install A4tech Rfkb-21