Generally I believe heat problems do not manifest themselves as slowness. Instead expect hardware crashes and such, and blue screens. Furthermore I think 60C is within acceptable temperature range. I think your problem might be caused by too many background programs and/or a slow hard drive. If your computer has an indicator light for "Hard Drive Active", take a look at it the next time you have slowness problems. It will probably be active, meaning your hard drive is 'clogging up' and your system is slowing down for its slowest part. The cure for this would be a faster hard drive but just get back to us first.
Edited by Ryan 3000, 29 September 2011 - 11:27 PM.
No pessimist ever discovered the secrets of the stars, or sailed to an uncharted land.