Hi and welcome to the Daniweb forums :).
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Can you please do the following.
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You will have to disable Spybot's Teatimer before we begin, as it will interfere with the fix. To do this can you start Spybot and go to the Mode button and select Advanced. Go to Tools > Resident and uncheck the box next to Tea-Timer. Make sure that the icon in the system tray is no longer there. If it is, just right click on it and select "Exit".
Download ResetTeaTimer.bat.
Double click ResetTeaTimer.bat to remove all entries set by TeaTimer.
Do not forget to re-enable teatimer when we are done :).
If teatimer gives you a warning afterwards that some changes were made, allow this instead of blocking it.
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Run HiJackThis then:
1. Click "Open the Misc Tools Section"
2. Click "Open Process manager"
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Next, while holding down the CTRL key, locate (if present) and click on (highlight) each of the following:
C:\WINDOWS\system32\kzgbenoj.exe
Now double-check and make sure that only those item(s) above are highlighted, then click "Kill process". Now, click "Refresh", check again, and repeat this step if any remain.
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Scan with HijackThis and then place a check next to all the following, if present:
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O4 - HKCU\..\Run: [ycbdvlic] C:\WINDOWS\system32\kzgbenoj.exe
Now, close all instances of Internet Explorer and any other windows you have open except HiJackThis, click "Fix checked".
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Locate and delete the following item(s), if present. Make sure you are able to view system and hidden files/ folders:
files...
C:\WINDOWS\system32\kzgbenoj.exe
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Note that some of these file(s)/folder(s) may or may not be present. If present, and cannot be deleted because they're 'in use', try deleting them in Safe Mode by doing the following: Restart your computer
After hearing your computer beep once during startup, but before the Windows icon appears, press F8.
Instead of Windows loading as normal, a menu should appear.
Select the first option to run Windows in Safe Mode hit enter.
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Reboot.
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After rebooting, rescan with hijackthis and post back a new log. Please let me know how your pc is now.