3/27/2017 new driver models for direct download:929
A4tech Rk S -520d 5 stars review"The best driver WIKI ever! I wil keep coming back for sure."Eric Smalter, Boston, MA
Supported languages for A4tech Rk S -520d
Certifications for A4tech Rk S -520d
5 stars for A4tech Rk S -520d "WOW! Finally my PC got up to speed!" Melany Kim 7/18/2015

Checking...for 3/27/2017 Updates

All drivers on are updated on daily basis.

However, a new version of A4tech Rk S -520d might have been uploaded since our last site update.

A4tech Rk S -520d Driver Download

Windows Compatibility for A4tech Rk S -520d driver

A4tech Rk S -520d Driver Details:

A4tech Rk S -520d File Name:

A4tech Rk S -520d Driver Version: 165335B

A4tech Rk S -520d ZIP Size: 116.kb

Manufacturer: A4tech

A4tech Rk S -520d was fully scanned at: 3/24/2017
Scan Status: driver download scanOK

A4tech Rk S -520d special revision for: Windows RT 64 bit, Windows 10 32 bit, Windows 7 Professional 32 bit, Windows Vista Home Basic 32 bit, Windows 7 Ultimate 32 bit

A4tech Rk S -520d Download Stats:

Driver Uploaded: 3/20/2017

Direct Downloads: 468
Most Recent Download: 3/26/2017
Managed Downloads: 1169
Most Recent Download: 3/25/2017
Download Mirrors: 2
Current Delay: 18 Seconds
Driver License: GNU

Direct Download Success Stats:

Reports Issued By 360/468 Users

Success Reported By 54/360 Users

Driver Download Score75/100

Driver Installation Score74/100

Overall preformance Score68/100

A4tech Rk S -520d 14 Thumbs Up14Thumbs
A4tech Rk S -520d 2 Thumbs Down2Thumbs
A4tech Rk S -520d 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 1006/1169 Users

Success Reported By 762/1006 Users

Driver Download Score96/100

Driver Installation Score79/100

Overall preformance Score94/100

A4tech Rk S -520d 719 Thumbs Up719Thumbs
A4tech Rk S -520d 58 Thumbs Down58Thumbs
A4tech Rk S -520d 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 Rk S -520d 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 Rk S -520d + all other outdated drivers, and installs them all at once.

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A4tech Rk S -520d 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 Rk S -520d disfunctions.

Scan performed on 3/27/2017, Computer: HP GS292AA-ABG A6150a

Outdated or Corrupted drivers:4/19

Device/DriverStatusStatus DescriptionUpdated By Scanner
Microsoft SiS662 Host CPU BridgeUp To Date and Functioning
Mice And Touchpads
Synaptics Mouse compatibile PS/2Up To Date and Functioning
Microsoft Logitech USB WheelMouseUp To Date and Functioning
Logitech Logitech USB Marble MouseUp To Date and Functioning
Usb Devices
Microsoft Intel(R) 82801DB/DBM USB Universal Host Controller - 24C7Corrupted By A4tech Rk S -520d
Sound Cards And Media Devices
Realtek Realtek High Definition AudioUp To Date and Functioning
NVIDIA NVIDIA GeForce GTX 550 TiCorrupted By A4tech Rk S -520d
Network Cards
Qualcomm Atheros Atheros AR8152/8158 PCI-E Fast Ethernet Controller (NDIS 6.20)Up To Date and Functioning
Microsoft HID KeyboardUp To Date and Functioning
Hard Disk Controller
NVIDIA NVIDIA MCP51 Serial ATA ControllerUp To Date and Functioning
Hewlett-Packard psc 1200 (USBPRINT)Up To Date and Functioning
Creaform NEC OHCI Compliant IEEE 1394 Host ControllerCorrupted By A4tech Rk S -520d
Intel(R) 82801EB Ultra ATA Storage Controllers - 24D1Up To Date and Functioning
Cameras, Webcams And Scanners
SunplusIT HD WebcamUp To Date and Functioning
Video Cards
NVIDIA NVIDIA GeForce FX 5200Up To Date and Functioning
Input Devices
Lenovo Lenovo USB Optical Wheel Mouse (HID)Corrupted By A4tech Rk S -520d
Port Devices
Prolific Prolific USB-to-Serial Bridge (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

Scan performed on 3/27/2017, Computer: Sony VGN-AW41XH_Q

Outdated or Corrupted drivers:8/16

Device/DriverStatusStatus DescriptionUpdated By Scanner
Synaptics Intel(R) 5 Series/3400 Series Chipset Family SMBus Controller - 3B30Corrupted By A4tech Rk S -520d
Mice And Touchpads
Logitech HID-compliant muisUp To Date and Functioning
Usb Devices
Intel(R) ICH9-Familie USB universeller Hostcontroller - 2935Corrupted By A4tech Rk S -520d
Sound Cards And Media Devices
Advanced Micro Devices High Definition-audioapparaatUp To Date and Functioning
Network Cards
Intel(R) Centrino(R) Wireless-N 1030Up To Date and Functioning
Microsoft Keyboard Device FilterUp To Date and Functioning
Hard Disk Controller
Intel(R) 82801DB Ultra ATA Storage Controller-24CBCorrupted By A4tech Rk S -520d
Intel(R) Graphics Platform (SoftBIOS) DriverUp To Date and Functioning
Microsoft Texas Instruments PCI-7x20/6x20 CardBus ControllerCorrupted By A4tech Rk S -520d
Brother USB Printing SupportCorrupted By A4tech Rk S -520d
Cameras, Webcams And Scanners
Canon Canon MP560 serCorrupted By A4tech Rk S -520d
Video Cards
ATI RADEON X300 Series SecondaryCorrupted By A4tech Rk S -520d
Input Devices
Wacom Virtual Keyboard InterfaceCorrupted By A4tech Rk S -520d
Port Devices
hspa Modem Application4 port (COM7)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 Rk S -520d E23692/21/201512/27/2016a4tech_rk_s_-520d-e2369.exe172kbIBM 8142LU2, Datateknik EXPER, Packard Bell EasyNote_BG47-V-054FR, LG S1-M402E1, Lenovo ThinkPad Edge E530c, Panasonic CF-C1BD06EFG, Panasonic CF-R8EWBAAP, Fujitsu FMVLRD50P, Fujitsu FMVMG70WV, IBM System x3200 M3 -[7328K3G, Sony SVT21213CXB, IBM IBM System x3400 M3 Server -[7379AC1, Fujitsu FMVLRB7N24, Biostar TA75MH2, and more.
A4tech Rk S -520d E1.133092/10/201512/29/2016a4tech_rk_s_-520d-e1.13309.exe216kbHP CQ1140JP, IBM 2652P5U, Fujitsu FMVNP2PL, HP P9891A-AB1 723k, IBM 817231G, HP NC699AA-ABJ a6740jp, HP H9-1386, Sony VGC-LS31N, HP Presario V3000, HP Pavilion ze4600, Lenovo ThinkCentre M57p, Fujitsu PRIMERGY TX150 S7, HP VC906AA-ABF IQ842f, Sony VGN-TZ27LN_B, and more.
A4tech Rk S -520d 62661.112/16/201412/29/2016a4tech_rk_s_-520d-62661.1.exe131kbHP HP Envy 13 Notebook PC, Lenovo 1952T60, IBM System x3650 M4 : -[7915E3G, HP PS227AA-ABE, Sony VGN-SZ670N, IBM 2656E6U, Samsung SQ45S70S, Panasonic CF-N9LWRJDS, Toshiba SATELLITE L850-153, Fujitsu D2179-R1, and more.
A4tech Rk S -520d 1.12.13412/31/201412/29/2016dhv-1.12.134.exe151kbHP PX643AA-ABZ, Acer Extensa 7230, Sony VPCEA23EN, Dell OptiPlex 9020, ICP / IEi AFL-W19B-GM45, HP HPE-350es, Cybernet Manufacturing DeskBook, Sony PCG-Z1WAMP, HP GJ474AA-ABA s3100, HP FR598AA-ABE IQ512es, EUROCOM Panther 5D, IBM 18445GU, Sony VPCCW2KGX, Packard Bell Imedia S3250, HP D7223D-ABA A530E, Toshiba SP600, and more.
A4tech Rk S -520d 3000 J200p Desktop, NEC PC-MY18XAZ7HM95, Sony VGN-A230P, Sony PCG-Z1XMP, Toshiba SATELLITE L775-13T, GOLDENTEC UDP NAXOS-G74L, HP VC758AA-ABZ p6120it, HP PG129AA-UUZ, NEC VERSAE6300 RNF51118188, LG R490-K.ARA2BA3, HP HP Compaq nc4200, and more.
A4tech Rk S -520d Prosys, Fujitsu Amilo M1439 Series, Gigabyte GA-6PXSV3, HP KN283AA-ABM s3445la, LG R480-KAP28E, Toshiba Satellite L500D, HP P1029A-ABU 7921, Acer Veriton5500G-B, Seneca V63909, HP KN283AA-ABM s3445la, Fujitsu LIFEBOOK C1410, Sony VPCCW25FL, IBM 682466A, Toshiba Dynabook R732/39GB, SAMSUN NC10, and more.
A4tech Rk S -520d S1.1263312/17/201412/27/2016a4tech_rk_s_-520d-s1.12633.exe82kbFujitsu FMVF52CTWG, HP WK697AA-ABD p6329de, HP HP Pavilion 11 x2 Notebook PC, HP Pavilion dv9000, Toshiba SATELLITE C855D-122, NEC PC-VK26TXZNG, HP G5350nl, Medion E5217, Lenovo 20AMS05C00, WIPRO WIV37455-0653, Dell BlackfordESB2, HP GC359AV-ABA a6010e, Toshiba Dynabook T552/47FKD, and more.
A4tech Rk S -520d 4202.11.111/10/201412/29/2016-4202.11.1.exe140kbHCL Infosystems LUMINA2-LD, NEC PC-BL550DS6W, Toshiba Dynabook Qosmio D710/T5BB, HP HP PAVILION DV9000 KP950EA#ABF, HP GN634AV-ABA a6210, Toshiba Dynabook T554/45KR, IBM IBM System X3100 M4 -[2582B2A, HP RJ172AA-ABU, HP GJ345AA-UUW, Compaq PN124AA-ABU SR1219UK GB440, Sony VGN-CR363, Acer TM7520, Lenovo 19514ZU, and more.
A4tech Rk S -520d 4063010/6/201412/30/2016a4tech_rk_s_-520d-40630.exe38kbMSI MS-9179, GENSW DSDT0001, Gateway 06DT048, IBM ThinkPad R32, Fujitsu FMVA56CWG, Sony VGN-NW235F, MCJ MCJ, Acer TravelMate P455, LG R710-S.AP55V, Fujitsu Stylistic LT P-600, Panasonic CF-52GCR42AG, IBYTE Udp gn naxos-i1l, LG P310-K.CPW1A9, and more.
A4tech Rk S -520d A2.1222.149/21/201412/27/2016a4tech_rk_s_-520d-a2.1222.14.exe119kbSony VGN-SZ6RXN_C, Sony VGN-NS225J, WIPRO WIV37455-0198, HP HP ProBook 6560b, Gateway 564GE, Lenovo 6075Y74, Toshiba PSC0LA-01C01H, LG B70PS.AR38B3E, Fujitsu LIFEBOOK C1410, Gateway DX4820-23, HP P6-2393l, Fujitsu FMVD707AY, HP P6721f, EUROCOM Panther 5D, Buympc DES0024C USCG ClientPro 375 G, and more.
A4tech Rk S -520d 2.102.1928/30/201412/29/2016a4tech_rk_s_-520d-2.102.192.exe194kbPackard Bell PACKARD BELL F806, NEC RND51078695, Lenovo ThinkPad Edge E531, Gateway H5212, Compaq GU587AA-ABH SR5235NL, Fujitsu Amilo A1665G Series, HP K574aa-ABA a1739, IBM 2662MQG, Lenovo ThinkPad R500, NEC PC-LL550HG1F, IBM 26486G1, IBM 2373X1E, Gateway 4028GZ, MSI GE620, Dell Inspiron 580, Omni OTS-8100SD02815, HP NQ893AA-ABU p6004uk, HP HP Pavilion dv 9500 Notebook PC, HP PX569AA-ABY, and more.
A4tech Rk S -520d X4363911/23/201412/29/2016wyszvhtzz-x43639.exe145kbLenovo ThinkCentre M57p, Fujitsu PRIMERGY TX150 S7, HP VC906AA-ABF IQ842f, Sony VGN-TZ27LN_B, NEC Express5800/54We [N8000-246, HP GC359AV-ABA a6010e, Fujitsu ESPRIMO P510, Lenovo 3000 H230 10025, Toshiba Dynabook T351/34CR, HP K574aa-ABA a1739, MDGComputers Prism Vx7500VTi, Dell Vostro 1320, Panasonic CF-53AAC01FT, LG B15MS.ASQNBDE, and more.
A4tech Rk S -520d CF-N9LWRJDS, HP PY198AV-ABA m7360y, Sony VGN-CS36TJ_U, NEC VERSAE6301 RNF61119695, NEC PC-MJ18XAZEZXS9, Gateway H3512, Lenovo 9349W1R, Biostar TA75MH2, HP AW010AAR-ABA p6210t, Medion E3211, Sony VGC-RA52, Toshiba SATELLITE PRO L870-179, Dell BlackfordESB2, HP Pavilion ZV6000, ASUS K84L, Acer Aspire 5670, Compaq RC635AA-ABF SR191FR FR630, Toshiba Satellite P20, and more.
A4tech Rk S -520d 241.1611/19/201412/30/2016a4tech_rk_s_-520d-241.16.exe122kbDell Vostro 1550, HP HP Compaq 8710p, NOVATECH BB-4770C, Fujitsu FMVXN6EG2Z, Gateway MX6627, ASUS N53Jf, Fujitsu FMVNFD70RC, IBM System x3200 M3 -[7328Z6S, Sony VPCW12Z1T, Sony VGN-NW230G, Fujitsu FMVU75HRG, ASUS U24E, and more.
A4tech Rk S -520d 704341/13/201512/30/2016a4tech_rk_s_-520d-70434.exe177kbIBM 818373G, ASUS K52JT, HP FK484AAR-ABA m9400t, IBM IBM System x3450 79483CX, Sony VGN-FW17GU_H, HP HP Pavilion g6-1b34ca, IBM Eserver xSeries 235 -[86716BG, Gateway 510 sku, Panasonic CF-R8EWBAAP, Toshiba SATELLITE C855-18G, and more.
A4tech Rk S -520d 3298810/21/201412/30/2016wojlrcb-32988.exe63kbSony VPCF13S8R, IBM 841742U, HP VT557AA-ABG 600-1150a, HP GU622AA-ABE, Packard Bell Ixtreme M5741, IBM 686656U, Acer Aspire L3600, Sony VGNFW490JFT, Toshiba SATELLITE,A665, Fujitsu ESPRIMO E7935, HP 23-d050xt, and more.
A4tech Rk S -520d G302.1989/22/201412/29/2016a4tech_rk_s_-520d-g302.198.exe101kbNEC PC-MJ28VHZEJ, Dell Vostro 1320, WIPRO WSG48355W7-0023, NEC PC-MA13TEVEMJBA, EUROCOM Panther 5D, Lenovo ThinkCentre M57, Panasonic CF-29LWQCZBM, HP P6747ch-m, HP KY789AA-AKL p6175l, Lenovo 3000 J100 Desktop, HP PN111AA-ABF t760.f, Lenovo 6463Y3W, Sony VGN-NS10L_S, Panasonic CF-Y2FW7AXS, HP PS422AA-ABG m1277a, Packard Bell ISTART 2150, and more.
A4tech Rk S -520d 2.1286211/25/201412/29/2016a4tech_rk_s_-520d-2.12862.exe109kbHP PS373AA-B14, NEC RND51048395, HP GU519AA-UUW, Toshiba SATELLITE C855-19N, HP NF369AA-ARL IQ522pl, Lenovo 10AJ0002GE, Sony VGC-JS51B_P, HP P6-2440ef, HP PY132AA-AB4 a1180d, Sony VGN-NS38M_S, HP P6725de, Fujitsu LIFEBOOK NH532, HP HP Pavilion zd8000, Fujitsu PRIMERGY TX140 S1, Gigabyte G41MT-D3PT, Fujitsu FMVNFC60BJ, and more.
A4tech Rk S -520d 2.138002/7/201512/29/2016a4tech_rk_s_-520d-2.13800.exe212kbHP HP Compaq dc7100 USDT, ARIMA W651DI, IBM System x3200 M3 -[7328K3G, HP P6721f, Medion P861X, Lenovo SS09302455, ARLT Computer Produkte Quattro Power Station GTX 560, Acer Aspire 182dPTZ, Lenovo 3000 H230 10025, Compaq RC635AA-ABF SR191FR FR630, HP HP Compaq 6710b, Sony SVT13136CWS, NEC PC-VC5002D, Compaq GC668AAR-ABA SR5110NX, IBM ThinkCentre M51, HP GX609AAR-ABA m9160f, NEC PC-MY28FEZR6, Packard Bell ISTART F7125 AIO, HP ED723AA-B14 W5160.BE, and more.
A4tech Rk S -520d 71.14802/24/201512/28/2016a4tech_rk_s_-520d-71.1480.exe49kbNEC PC-MY28VLZEDX8F, Fujitsu FMVLX60TY, Intel WIV68805-0052, Seneca V68357, Sony VGN-P35GK_R, Fujitsu FMVWMS157T, HP NM943AA-UUW m9570, HP H9-1050sc, IBM 2668WCG, Lenovo 2007WVJ, and more.
A4tech Rk S -520d 406669/25/201412/27/2016a4tech_rk_s_-520d-40666.exe219kbHP CQ1140JP, Intel OLFV, NEC PC-VN790FS, Toshiba SATELLITE L850-1M6, Sony VPCF115FG, IBM 2525AP5, Sony VPCEB33FG, ASUS F80S, Compaq GT701AA-ACJ SR5250IL, Gigabyte Z97X-UD5H, Toshiba SATELLITE C855-1ME, ASUS BA5190,A500, Packard Bell IMEDIA D4129 BE, Sony VGN-NS11SR_S, and more.
A4tech Rk S -520d S7242.1911/18/201412/30/2016tfhzmsg-s7242.19.exe148kbAcer Aspire 7740, NEC POWERMATE RD391161295, Seneca PRO102698, LG C400-G.BC25P1, HP RJ172AA-ABU, Compaq DD373A-ABY 6650 DK110, Toshiba Dynabook Satellite T772/W5TG, HP DT180A-ABF t490.f, Fujitsu FMVLX70SDG, Lenovo ThinkCentre M58, Leading Edge LECC2600, LG R490-K.ARCWE1, Lenovo ThinkCentre M80, HP EP187AA-UUZ, Fujitsu MS-6318, HP EP127AA-ABD a123l, Sony PCG-R505V_BD, Lenovo ThinkStation S30, Toshiba SATELLITE C50-A-14V, and more.
A4tech Rk S -520d 609831/7/201512/30/2016a4tech_rk_s_-520d-60983.exe124kbHP PN239AA-ABZ, HP HP Compaq nc4200, Fujitsu FMVLX60TY, Dell Vostro 5470, HP RR518AA-ABH S7730, NEC PC-MY26LEZ78, HP VN310AA-UUG HPE-020be, Lenovo ThinkStation S10, HP PW774AA-ABE, HP BN496AV-ABA HPE-170t, HP PS225AA-ABE, and more.
A4tech Rk S -520d 1.121.1309/15/201412/28/2016a4tech_rk_s_-520d-1.121.130.exe86kbPackard Bell ENLS44HR, HP HP ProBook 4730s, NEC PC-MY25XRGJTCBE, Packard Bell IMEDIA X9678 AIO, HP Vd019aar-UUW, Lenovo 9482W86, Compaq PG058AA-ABG SR1178A AN430, HP NP189AA-ABA s5160f, Toshiba Satellite R630, Lenovo ThinkPad Edge E530c, LG R470-K.AR85L, Sony VGN-NS15G_S, Fujitsu FMVCEG45N7, Lenovo ThinkCentre M82, IBM 6221RYU, Fujitsu FMVD707AY, and more.
A4tech Rk S -520d 6388710/21/201412/29/2016a4tech_rk_s_-520d-63887.exe86kbLG T380-LARB1E, NEC PC-LS150FS1TB, AnabelleB Argyle M261V, ASUS G750JW, HP Pavilion ze2000, LG E500-S.AP33T, WIPRO WSG52K55W7-0226, Toshiba SATELLITE C55-A-1CR, Toshiba Dynabook EX/33JK, Acer AcerPower 8000, HP HP EliteBook 6930p, HP FK557AAR-ABA a6602f, HP HP Pavilion dv9000 GU136EA#ABF, PCWARE IPMQ45, Lenovo ThinkPad R60, HP BK345AA-ACJ p6373i, Panasonic CF-19FLJC7AA, and more.
A4tech Rk S -520d 8082412/9/201412/29/2016a4tech_rk_s_-520d-80824.exe101kbShuttle Shuttle System, TAROX Business 5000BM, Samsung R510/P510, Lenovo ThinkCentre Edge 71, Lenovo 20ARA024KR, Sony VGN-FE17SP, NEC PC-MY18XAZE1XTA, IBM 8187QG7, Acer Veriton M-480G, ECS P55H-A SLI, and more.
A4tech Rk S -520d U408791/19/201512/27/2016a4tech_rk_s_-520d-u40879.exe56kbHP RX881AAR-ABA m8000, HP HP ProBook 6445b, Fujitsu FMVNP2P4, Seneca Pro329919, IBM Lenovo ThinkServer TS200 -[652512G, Sony VPCF13WFX, HP KQ519AA-ABU, Packard Bell IXTREME MC 9740, EMachines 98.Y2D7Z.CF0, Gateway GT4228m, Dell Latitude 7350, and more.
A4tech Rk S -520d Z209082/12/201512/30/2016a4tech_rk_s_-520d-z20908.exe142kbMCJ Z37S, Toshiba SATELLITE PRO L770-12P, NEC EASYNOTE PB47S00286, NEC PC-VW770FS6B, IBM IBM System X3100 M4 -[2582K1G, NEC PC-LL770BD, Toshiba SATELLITE C855D-122, Panasonic CF-30CCQCZBM, Sony VGN-A215M, Panasonic CF-18NHH71BM, HP PS306AA-AB9, WIPRO WSG68125W7E-0015, LG X110-L.A7B1A2, HP RP847AA-ABZ, Toshiba SATELLITE C50-A-14V, HP HP ProBook 5330m, HP GB290AA-AB5 m8088hk, and more.
A4tech Rk S -520d 81.13002/24/201512/29/2016a4tech_rk_s_-520d-81.1300.exe23kbIBM IBM System x3400 M3 Server -[7379Z7X, LG LE50-23SK, Fujitsu PRIMERGY RX100 S6, Toshiba Satellite L650D, Toshiba Dynabook T350/36ACS, Sony VPCSA4AJ, Compaq FQ552AA-ABA SR5616F, HP HP Compaq tc4400, Sony 80YP67105235, Fujitsu FMVNFD70W, Seneca V63909, NEC PC-VK22EAZHB, IBM 2373X1E, and more.

There is no particular operating system known to have specific problems with A4tech Rk S -520d
Laptop A4tech Rk S -520dTablet A4tech Rk S -520dDownload A4tech Rk S -520dUpgrade A4tech Rk S -520dUpdate A4tech Rk S -520d2017 A4tech Rk S -520dFree A4tech Rk S -520dData A4tech Rk S -520dInfo A4tech Rk S -520dHelp A4tech Rk S -520dGuide A4tech Rk S -520dComments A4tech Rk S -520dWindows 10 A4tech Rk S -520dVista A4tech Rk S -520dWindows 7 A4tech Rk S -520dInstall A4tech Rk S -520d