Setup (upgrade) stops responding when 37 minutes are left

I use Windows XP Professional
And I tried to upgrade my windows xp pro (Press set up and select upgrade)
After the installation copied the files and 37 minutes were left, the
computer restarted. This thing happened again and again..
Can you guide me what to do.
FORMATING IS THE LAST OPTION AND I WANT TO AVOID IT..

Please advise

Thanks in Advance

Smestarz