If you install new program, sometimes it will make itself to run on startup such Adob Photoshop, Antivirus, Yahoo Messenger and many more. Truly if you run many programs on startup will make your computer start slowly. The solution is to disable some of them. I recommend you don’t disable firewall and antivirus so you can disable the others.
The question is how to disable it in Windows? You can use msconfig.exe that previously available on Windows XP and Vista too. Press [start] + r on your keyboard and type msconfig and next click [OK]
It will open msconfig.exe for you and you can click [Startup] and you can uncheck which program you want to disable on startup and then click OK.
Next System Configuration will ask you to restart computer.
After above process if you have disabled some program, you will find your computer run faster on startup. Enjoy it.