I just read your first post again. It seems like you have an extension problem. Since you can run LimeWire just fine with extensions off. Try disabling extensions that might interfere with LimeWire. This is all I can think of now. Good luck. Just to let you know here are the Minimum System Requirements for LimeWire:
- 64 MB RAM
- Any of the following operating systems:
Microsoft Windows 95, 98, NT, Me, 2000, XP
Mac Classic 8.1 or later
Mac OSX
Linux
Unix such as Solaris - A live connection to the Internet