I have not heard of the smitfraudfix causing this type of problem so it may be something else.
Go to Start > Run and type: services.msc
In the Services Window that opens, scroll down to "FastUser Switching Compatibility" and try activating the service manually again.
If that does not work, then check the registry. This may require making changes in the registry. Always back up
your registry before making any changes. If you are not familiar with working in the registry, then you should NOT attempt to do this on your own. Improper changes to the registry could adversely affect your computer and render it inoperable.
Go to Start > Run and type: regedit
Make sure the Value Data is set to 1
Value Data: (0 = Disable Fast User Switching, 1= Enable)
If that does not work, then chances are malware still exists on your machine and may be responsible. If that's the case its time to have a deeper look as to what's going on with your system by creating a hijackthis log. This will help us to identify and remove the malware files responsible for your problems.
Please read and follow all instructions
in the pinned topic titled Preparation Guide For Use Before Posting A Hijackthis Log.
When you have done that, post a log
in the HijackThis Logs and Analysis Forum
, not here
, for assistance by the HJT Team Experts.
It may take a while to get a response because the HJT Team members are very busy. Please be patient as they are volunteers who will help you out as soon as possible. Once you have made your post, please DO NOT make another reply until it has been responded to by a member of the HJT Team. Generally the staff checks the forum for postings that have no replies as this makes it easier for them to identify those who have not been helped. If you post another response, a team member, looking for a new log to work may assume another HJT Team member is already assisting you and not open the thread to respond.