Go ahead and try the SFC scans again. In addition, use your spybot search/destroy to scan your computer after updating it. I would consider your computer free of malware after that, but someone else may have a suggestion.
Originally Posted by DustSailor
The things that are left - consider malware broke something, or consider an installed program broke something. A broken registry is too difficult to repair with my skills.
Ensure that ALL IE add-ons except adobe are disabled, until we can find the problem. UNINSTALL any toolbar. If avast attempts to enable its add-on, disable it. You do not need it right now. Reset IE again.. using the words of the good Capt. Jack:
Next steps which used to fix almost all the issues with Internet Explorer is to reset the Intenet explorer to Default Settings
1. Close any Internet Explorer or Windows Explorer windows that
are currently open.
2. Open Internet Explorer by clicking the Start button ,
and then clicking Internet Explorer.
3. Click the Tools button, and then
click Internet Options.
4. Click the Advanced tab, and then click
5. Select the Delete personal settings check box if you would like to
remove browsing history, search providers, Accelerators, home pages, and
InPrivate Filtering data. [Me: - actually checking this box fixed an issue for me, but removes everything stated here]
6. In the Reset Internet Explorer Settings dialog
box, click Reset.
7. When Internet Explorer finishes applying default
settings, click Close, and then click OK.
8. Close Internet
Your changes will take effect the next time you open Internet