Or perhaps you haven't given enough information.

You did, at least manage to mention your OS - but "my computer crashes" and "The software doesn't work" isn't enough for anybody to begin diagnosing what your problem is.

When, exactly, does you computer crash? When you start LimeWire? When you close it? When you've left it running for a few minutes? hours? days? weeks? years?

What do you mean your computer doesn't recognise the files you download? MP3s? AVIs? MPGs? EXEs? SITs? ZIPs? All of them?

Or do you mean that your computer can't find them once downloaded? Or something else?

Mark