Herman Moothery , If you find yourself having to prod the fan to get it to spin, replace the CPU fan as it is sticking and probably faulty/worn out, new fan is inexpensive insurance to keep the CPU cool. Link below is just an example of a new fan that can be purchased, you can also do a search for perhaps better pricing. Good luck.

I hope this helped you out, if so let me know by pressing the helpful button.

http://www.ebay.ca/itm/like/371612158491