Ok, goman, sre you ready to work?
Start hijackthis, select Scan Only, place checkmarks against all the entries listed below that still exist, and then press Fix Checked.
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe,ajxgjla.exe
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn1\yt.dll (file missing)
O2 - BHO: Yahoo! IE Services Button - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll (file missing)
O2 - BHO: (no name) - {694CDA59-0CF1-4164-95B5-F00A6967B8AD} - C:\WINDOWS\system32\awtqp.dll (file missing)
O2 - BHO: (no name) - {723a75d1-4266-4cd4-a64e-d9a56dff5e44} - C:\WINDOWS\system32\agerdnm.dll (file missing)
O2 - BHO: (no name) - {88C91A94-FC53-4313-AF73-3D28EA7195C8} - C:\Program Files\Common Files\rymyd.dll (file missing)
O2 - BHO: (no name) - {9A684959-C5A9-4487-8693-315C7D53DB84} - C:\Program Files\Windows NT\ryfynoxul58441.dll (file missing)
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn1\yt.dll (file missing)
O4 - HKLM\..\Run: [xvepxe] C:\WINDOWS\system32\yeaxyg.exe reg_run
O4 - HKLM\..\Run: [win320495967] C:\WINDOWS\win320495967.exe
O4 - HKCU\..\Run: [WebBuying] C:\Program Files\Web Buying\v1.7.4\webbuying.exe
O4 - HKCU\..\Run: [uskqa] C:\WINDOWS\system32\yeaxyg.exe reg_run
O9 - Extra button: Yahoo! Services - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll (file missing)
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe (file missing)
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe (file missing)
O20 - Winlogon Notify: awtsp - C:\WINDOWS\system32\awtsp.dll (file missing)
O20 - Winlogon Notify: Internet Settings - C:\WINDOWS\system32\wkdsp.dll (file missing)
O20 - Winlogon Notify: ThemeManager - C:\WINDOWS\system32\wrapi.dll (file missing)
O23 - Service: AOL Antivirus Update Service (aolavupd) - America Online, Inc - (no file)
O23 - Service: Microsoft SCC Host Protocol (POOLSVR) - Unknown owner - C:\WINDOWS\poolsv.exe (file missing)
Good. Now go Start, run, type cmd and …