Hi and welcome to the Daniweb forums :).
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Please read the last line in my signature.
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Download the newest version of HiJackThis ; version 2.0.2. Place it in a permanent folder before scanning. Repost your log after following the steps below. This version has features that might be more helpful in 'cleaning' up your system.
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Scan with HijackThis and then place a check next to all the following, if present:
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = :
O2 - BHO: (no name) - {20d22820-43ad-4db1-9c86-cb54414152f0} - C:\WINDOWS\system32\vtUkiJCu.dll
O7 - HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System, DisableRegedit=1
...(Unless you've restricted the use of registry editing, have HiJackThis fix this.)
O20 - Winlogon Notify: wgalogon - C:\WINDOWS\
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\vtUkiJCu.dll
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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.