'Memory Access Violation' means that a program has tried to access memory that it doesn't own. This indicates a severe bug in software, malicous software or corrupt software.

From your description - you could not install LimeWire because there is a fault with your system. It does not sound as though LimeWire caused or introduced that fault - more as though it was a victim of that fault.

Since you seem to be getting the error frequently, it suggests that an important component of windows has been damaged. I wouldn't dream of trying to remotely diagnose your system.

If you have a system recovery disk - use it.

If that fails - you may well need to reformat and start again. If you can't bear to do that - you will need to find somebody to fix your computer for you.

Mark