Close all (browser) windows & rescan with hijackthis. When the scan is finished place a check in the box to the left of the following entries & click 'fix checked':
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page_bak = about:blank
R3 - URLSearchHook: (no name) - _{CFBFAE00-17A6-11D0-99CB-00C04FD64497} - (no file)
O2 - BHO: (no name) - {000020DD-C72E-4113-AF77-DD56626C6C42} - (no file)
O4 - HKLM\..\Run: [PCDRealtime] C:\WINDOWS\realtime.exe
O4 - HKLM\..\Run: [exthybr] C:\WINDOWS\System32\kbjvgf.exe
O4 - HKLM\..\Run: [HCPC] C:\WINDOWS\System32\HCPC.exe
O4 - HKLM\..\Run: [uickTimeVRQ] C:\WINDOWS\System32\uickTimeVRQ.exe
O4 - HKLM\..\Run: [ASSERR] C:\WINDOWS\System32\ASSERR.exe
O4 - HKLM\..\Run: [ti2evxxa] C:\WINDOWS\System32\ti2evxxa.exe
O4 - HKLM\..\Run: [BDUSRK] C:\WINDOWS\System32\BDUSRK.exe
O16 - DPF: {2048B51E-8D74-4762-82CE-B48CF545EEEA} (CAX Object) - http://www.atex.cc/dm/cax.cab
Reboot into safe mode following the instructions here & navigate to & delete the following if found:
C:\WINDOWS\realtime.exe
C:\WINDOWS\System32\kbjvgf.exe
C:\WINDOWS\System32\HCPC.exe
C:\WINDOWS\System32\uickTimeVRQ.exe
C:\WINDOWS\System32\ASSERR.exe
C:\WINDOWS\System32\ti2evxxa.exe
C:\WINDOWS\System32\BDUSRK.exe
Reboot normally after doing the above then post a fresh log please.