Do you have a hard time opening up Windows 7? I would hope not, but if you are the kind of person that has to download anything and everything, and it is effecting your computers performance, here is a fix for you:
1. Open Windows Defender by clicking the Start button , clicking All Programs, and then clicking Windows Defender.
2. Click the Tools button, and then click Software Explorer.
3. In the Category box, click Startup Programs.
4. Select the program that you want to prevent from running, and then click Disable.
5. Click Yes to confirm that you want to stop that program from running.
6. Repeat steps 4 and 5 for every program you want stop from running
And, you are done. Enjoy!