please list the specifics of your comp - OS, RAM, free memory, internet connection type and LW version.
"disk problem" error is seen when
a. something's wrong with the file you dwnloaded [also says file corrupted]
b. you may not have enough memory to store the stuff u dwnload.

try uninstalling LW, delete all limewire-related stuff [including the limewire preferences file] you find on your comp and then reinstall LW.
also, to free up memory you can use a handy little program called ccleaner which you can get from any downloads site like download.com or filehippo or sourceforge.
and to be on the safer side, run some anti-spyware/adware programs after doing a virus check.
hope this helps.