Thanks I uninstalled the virus software, disabled windows firewall, cleaned up temp folders, extracted the install file first using WinRAR.
Unfortunately that didn't help to solve the problem.
Extracting works.
After extracting, the installation stops after about 5 seconds, displaying nothing but a mouse icon change ('working').
I tried to execute several freshly downloaded install files, worked.
Only the MC-related executables don't work.
So I can't remove, run or install any MCx.
When trying to remove, the 'invalid access to memory location' message pops up.
Could there be any kind of damage to the registry after the crash causing the problem?
Is it possible to check the registry settings related to MC?
In my personal last.fm track history I found awkward track playing times of the latest played album; it seems that some tracks were skipped or so.
See
http://www.last.fm/user/reakoh/tracksI checked these files using another player and found the files are not corrupt.
The album was played using Gizmo, although I was not listening during these 20 minutes; I was away.
Strange that the play order was reversed too, I just pressed play in recently played albums (Gizmo).