This system is a dell factory computer 2 years old. intel core2 duo cpu E6550 @2.33 ghz, 2 gigs ram windows xp. When i run multiple programs at once im hearing alot of noise from tower like a churning noise. Cpu is around 80 percent or more when this happens. I get computer locking up and sometimes need to reboot. I have no external fans or cooling. I installed cpuid and the cpuvcore is around 1.15 v to 1.30 v. Any ideas what the issue is..will more memory help?? windows xp is the OS.