Is it just a blue screen you get or the BSD? Is it a Dell you're using. Some Dell models had an issue that required updating. What type of graphics card do you have & have you updated its driver recently.

To re-iterate some of Night-Fire's questions:

Can you give us a total desciption of your set up:
1. OS version? (eg: Windows 98)
2. What firewalls you have?
3. ram?
4. Hard Disk space available?
5. Connection type? (eg: dialup, broadband, cable, etc.)
6. Modem & router brand name & model numbers?
7. Where are you trying to connect from (home, school, work, etc.)?
8. What version of Limewire (LW) & Java do you have?