Do you have the 'Winrar' archiving program installed on your computer?
Download CWShredder from here:
http://www.intermute.com/spysubtract/cwshredder_download.html
Unzip to your desktop, run it, and then:
1. Click "Check For Update"
(If an update isn't available, skip to step 4)
2. Click "Click here to Download the upate"
3. When the new version has been downloaded, click "Save"
4. Click "Fix"
If it asks you to verify any files to be deleted, either do a Google search for it/them or ask us here before deleting.
Put HijackThis into it's own folder by right-clicking on your desktop, select New, Folder; name the folder whatever you like (something like HJT or hijackthis would be best). Then drag the hijackthis.exe icon that is on your desktop into the new folder.
Close all browser windows, scan with HJT, and post a new log please.