Flash won't install in IE after FakeAVG trojan

Question

Help, please.  My computer had a FakeAVG Trojan (detected by MalewareBytes) and now I cannot get Adobe Flash to properly install.  The trojan was completely cleaned.  I have tried multiple steps including using Adobe tools to uninstall and reinstall, both with download manager and manual.  I am running Vista 64 bit, but IE is 32 bit.  I have tried IE 7 and IE 8.  Adobe Flash Player 10 Active X is showing in Programs and Features, but when I check the Add-ons in IE, the only Adobe product listed is PDF Link Helper, and it's disabled.  I have looked at All Add-Ons and Run Without Permission.  I have been able to install Adobe Flash Player in Safari and it works natively in Chrome, but I cannot figure out why it is not working in IE.  Any help would be greatly appreciated.  Thanks.

Answer 1

eidnolb, thanks for your response.  I am using Avast (Free version) and it us fully updated.  I have ran Malewarebytes on a full scan again, after finding the original trojan, and it found nothing.  It did not correct the issue.  Below is all I found in the log file.  Although, the initial clean was performed with a version of SuperAntiSpyware Portable that allow me to run it from a flash drive.  This cleaned it enough to allow me to install and run Malewarebytes.  I don't think I have a log file from what it found.
Malwarebytes' Anti-Malware 1.50.1.1100
www.malwarebytes.org version: 5669
Database
Windows 6.0.6002 Service Pack 2
Internet Explorer 8.0.6001.18999
2/3/2011 12:06:06 PM
mbam-log-2011-02-03 (12-06-06).txt
Scan type: Quick scan
Objects scanned: 165843
Time elapsed: 3 minute(s), 35 second(s)
Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 2
Memory Processes Infected:
(No malicious items detected)
Memory Modules Infected:
(No malicious items detected)
Registry Keys Infected:
(No malicious items detected)
Registry Values Infected:
(No malicious items detected)
Registry Data Items Infected:
(No malicious items detected)
Folders Infected:
(No malicious items detected)
Files Infected:
c:\Windows\System32\iesafemode.exe (Rogue.FakeAVG) -> Quarantined and deleted successfully.
c:\Windows\SysWOW64\iesafemode.exe (Rogue.FakeAVG) -> Quarantined and deleted successfully.