I have a desktop computer which is running on Windows XP service pack 3. Internet Explorer is the default browser which I use to surf the Internet. I was running the Adobe update which got complete and then the system prompted for restart. After the system restarted, the performance of the PC degraded. It takes long time to boot the system as well as to run any application. How can System become slow after Adobe update? Please help me as I am not able to figure out what the problem is.