My son's computer is an emachine athlon Xp 3200+ The default setting is 166 and that makes it an xp 2500. I'm trying to extend its life. My question is, will it help to keep the default setting or can I go back to the 200 setting that will make it a 3200? PS: I've had it at the 200mhz setting for a couple of years with no problems. What are the pros and cons of this. Thank you