after reinstal and restart of windows 7, it seems to be working without hanging for the moment. can it be nescessary to uninstall completely?
Almost never, but sometimes it is worth a shot if you're having trouble.
If so, do this:
Uninstall.
Reboot.
Reinstall.
Don't skip the reboot step!
My guess, in this particular case, is that some process had file #2 locked, and MC was waiting for the lock to be released. When Windows says a program is unresponsive, it doesn't
necessarily mean it is crashed. It just means it is non-responsive. This can mean it is waiting for something in the main thread (or all the threads are locked waiting for whatever needs to happen). When MC reads/writes file metadata, it does seem to lock the main thread, so if you have a very slow disk, or files on a disk that are locked by another process, it can "look like" MC is hanged for a LONG time.
If you wait long enough, MC throws an error eventually and "unsticks", though this probably doesn't apply to the "applying tags" thing that happens after you close the main application.