The solution for this problem is quite simple. Windows provide a special mechanism to restore computer to its previous state. Every time user makes some significant changes, the system creates so called “restore point”.
User also can create his own restore points.
To access System Restore tools you have to do the following steps:
1.Click Start.
2.Choose All Programs.
3.Choose Accessories.
4.Choose System Tools.
5.Click System Restore.
Then you should follow instructions on the wizard.