Computers - Can't Live Without them Even if they are temperamental!

For the second time in a month I have lost my iTunes and am having to reload them from back-up files.
This is a pain in the ass considering the size of the file-over 48Gig.
I wouldn't have to it if my system wouldn't lock up and cause me to reboot.
What can you do!
Computers are now a utility we cannot live without!