Three things to try
1. Download and run the MVT virtual technician from
see if it ses any issues and fixes them
2. Try a full uninstall reinsyall as per link in my signature
before your reinstall after uninstalling run
and reinstall from your account
3. If above fails best to call support it is free and see if they can assist. If you bypass 1 and 2 support will probably try them first.
umm yeah I tried uninstalling mcafee but it got stuck on 50% then the whole thing froze so had to force restart. Now mcafee seems to be gone from list of programs I can uninstall but it's still there in task manager (though not using loads of CPU last time I looked) does this mean it's gone??
No you need to run the mcpr removal tool . The issue I see is the windows /control panel removal is done first this clears the files (most of them ) and frees up the licence then you run MCPR after a reboot. Definately something is corrupted here so try the mcpr Tool.