I have an older Thinkpad that I recently decided had some use for someone. I loaded XP Pro, SP3 and the system was running great with very reasonable response times to load programs etc. It is a single processor so was not expecting high response rates. However, after loading approximately 125 MS updates, this system is extremely slow. I am using MS Security Essentials. I've also run CCleaner, JV16 PowerTools Lite but nothing seems to fix this issue. What could the MS updates be doing or have done that would slow down this system so much? BTW....no new programs have been added that would change the response rate.