You're infected with PurityScan/Clickspring adware, as well as SurfSideKick and some other malware. Run Hijack This again in Safe Mode, and put a check next to the following:
C:\WINDOWS\system32\l?***.exe
O4 - HKCU\..\Run: [Czbfwaq] C:\WINDOWS\system32\l?***.exe
O4 - HKCU\..\Run: [CU1] C:\Program Files\Common Files\VCClient\VCClient.exe
O4 - HKCU\..\Run: [CU2] C:\Program Files\Common Files\VCClient\VCMain.exe
O20 - Winlogon Notify: browsela - C:\WINDOWS\system32\browsela.dll
O4 - HKLM\..\Run: [0wso0fis.dll] RUNDLL32.EXE 0wso0fis.dll,b 223343328
O4 - HKLM\..\Run: [BatSrv] C:\WINDOWS\batserv2.exe
Hit "Fix Checked", then run scans with Ad-Aware SE and Spybot S&D just to make sure that you got it all.
EDIT: The asterisks were inserted by Techspot's filter. Figure out what they stand for.