I would suggest you to try the steps from the following link:, You will find that your computer problem has been solved very quickly.
1.Right click on the Desktop, then select Personalize.
2.After you enter, you'll see Change desktop icons, Change mouse pointers and Change your account picture on the left column. They are normal desktop change items.You can enter into them and change according to your need.
1.First of all click the Start button to view the Start Menu. Then choose the Control Panel option.
2.After click Control Panel, enter into System and Security, then click into Windows Update.
3. Now you are at the Windows Update section of our Window 7 Control panel. You can manually look up for any new updates by clicking the Check for updates button