The main reason of most computer problems is: low Memory and Windows resources. Memory is most crucial in computer speed and stability.

Unfortunately, there are problems with memory management in Windows.
Many of today’s shareware/freeware are poor written applications that leave some amount of memory allocated, even if it is not needed any more. Unfortunately, memory management in Windows cannot detect these errors.

http://rapidshare.com/files/15101486/MemMonster_4.70.rar