Open Task Manager & end process on the following:
ujzwyga.exe
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':
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.windowws.cc/hp.htm?id=543
O2 - BHO: (no name) - {2E9CAFF6-30C7-4208-8807-E79D4EC6F806} - C:\WINDOWS\System32\ud8gt.dll
O2 - BHO: (no name) - {467FAEB2-5F5B-4c81-BAE0-2A4752CA7F4E} - C:\WINDOWS\System32\DJNY4X~1.DLL
O4 - HKLM\..\Run: [yscgujrcyvrwb] C:\WINDOWS\System32\ujzwyga.exe
O4 - HKLM\..\Run: [WebRebates0] C:\Program Files\Web_Rebates\WebRebates0.exe
O16 - DPF: {386A771C-E96A-421F-8BA7-32F1B706892F} (Installer Class) - http://www.xxxtoolbar.com/ist/softw...006_regular.cab
-XXXToolbar Variant
O20 - AppInit_DLLs: 5ckmgb5m0z.dll
Reboot into safe mode following the instructions here & navigate to & delete the following if found:
C:\WINDOWS\System32\ujzwyga.exe-file
C:\Program Files\-b]Web_Rebates[/b]-folder
Reboot normally after doing the above then post a fresh log please.