These sort of permission errors are common with malware.
I suggest you head over to the malware forums. Read this thread first
Following what is outlined there you will get rid of at least the majority of your malware problems.
If the problem still persists post a Hijack this log in this forum
for the experts to analyze.
If it has been 3 days and you haven't received help, post in the waiting room
and someone will get to you.
Just a heads up ... replying to your own thread will likely make you wait LONGER
as it makes you appear to be receiving help already.