SPYWARE and slow pc

My brother just visited for the week and he hooked up his internet to my modem and ever since he did, my computer has been filling with viruses and my desktop background is some spyware crap which refuses to change.

I ran HIJACKTHIS and here's the results:

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = file://c:/windows/homepage.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = file://c:/windows/homepage.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = file://c:/windows/homepage.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = file://c:/windows/homepage.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = file://c:/windows/homepage.html
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = file://c:/windows/homepage.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,First Home Page = file://c:/windows/homepage.html
O2 - BHO: StFlex IE Helper - {8334A30C-49E5-489a-B63D-5B927C1EF46E} - C:\Program Files\QdrDrive\QdrDrive15.dll
O2 - BHO: (no name) - {C7BBC1FA-E415-4926-9A47-9AB58D0B3BC8} - C:\WINDOWS\system32\nnnnMDSm.dll
O2 - BHO: Microsoft copyright - {FFFFFFFF-BBBB-4146-86FD-A722E8AB3489} - sockins32.dll (file missing)
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime Alternative\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe"
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [Adobe Photo Downloader] "C:\Program Files\Adobe\Photoshop Album Starter Edition\3.2\Apps\apdproxy.exe"
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVG7\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [MSConfig] C:\WINDOWS\pchealth\helpctr\Binaries\MSCONFIG.EXE /auto
O4 - HKLM\..\Run: [webHancer Agent] C:\Program Files\webHancer\Programs\whagent.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Aim6] "C:\Program Files\AIM6\aim6.exe" /d locale=en-US ee://aol/imApp
O4 - HKCU\..\Run: [msnmsgr] "C:\PROGRA~1\MSNMES~1\msnmsgr.exe" /background
O4 - HKCU\..\Run: [QdrModule15] "C:\Program Files\QdrModule\QdrModule15.exe"
O4 - HKUS\S-1-5-19\..\Run: [AVG7_Run] C:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [AVG7_Run] C:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\..\Run: [AVG7_Run] C:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [AVG7_Run] C:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 'Default user')
O7 - HKCU\Software\Microsoft\Windows\CurrentVersion\Pol icies\System, DisableRegedit=1
O9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\Program Files\AIM\aim.exe
O10 - Hijacked Internet access by WebHancer
O10 - Hijacked Internet access by WebHancer
O10 - Hijacked Internet access by WebHancer
O20 - Winlogon Notify: nnnnMDSm - C:\WINDOWS\SYSTEM32\nnnnMDSm.dll
O21 - SSODL: WebProxy - {66186F05-BBBB-4a39-864F-72D84615C679} - sockins32.dll (file missing)
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft AB - C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
O23 - Service: AVG E-mail Scanner (AVGEMS) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgemc.exe
O23 - Service: Canon Camera Access Library 8 (CCALib8) - Unknown owner - C:\Program Files\Canon\CAL\CALMAIN.exe (file missing)
O23 - Service: Diskeeper - Executive Software International, Inc. - C:\Program Files\Executive Software\DiskeeperLite\DKService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: ?????? iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: MsSecurity Updated (MsSecurity1.209.4) - Unknown owner - C:\WINDOWS\b2new.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - NetGroup - Politecnico di Torino - C:\Program Files\WinPcap\rpcapd.exe
O23 - Service: Sony SPTI Service (SPTISRV) - Sony Corporation - C:\Program Files\Common Files\Sony Shared\AVLib\SPTISRV.exe
O23 - Service: SonicStage SCSI Service (SSScsiSV) - Sony Corporation - C:\Program Files\Common Files\Sony Shared\AVLib\SSScsiSV.exe
O23 - Service: Viewpoint Manager Service - Viewpoint Corporation - C:\Program Files\Viewpoint\Common\ViewpointService.exe



Does anyone see anything that needs to be fixed/removed or have any other suggestions to what the problem might relate too?
Thanks.

Well, all of the references to homepage.html indicate an infection, probably by a smitfrad variant. The StFlex entry is generally associated with the Adclicker trojan (sometimes Hyper Rotator)as are any entries for QDR, and of course, all the Wehancer entries are malware. The winlogon entry is also malware related, and you have missing files entries that are tracks of malware that has been removed.

So, I'd start with Sypbot Search and Destroy 1.5. Install it, update it, then disable System Restore, reboot to Safe Mode and scan. I think this should clear up most if not all of your problems, but you might need to run some additional tool like SmitfraudFix or Combofix. But I'd start with Spybot. Once you feel like the machine is clean, don't forget to trun System Restore on again.