After somedays our PC seem to run slow. Its mainly because of the programs you install starts at the startup. Many of these programs are unnecessary and can be stopped at the startup.
1) Click on Start-> Run and type msconfig
2) Uncheck unnecessary programs but don’t uncheck everything (some are very important) like the antivirus software. If you don’t know about the program, DONT UNCHECK IT.
3) Softwares like Adobe, Gtalk, Sony Ericsson Updater, etc can be unnecesary to boot at the startup. Uncheck these software.
4) Restart the PC. You’ll find a prompt. Just check the don’t show this next time and click on OK.