Windows system restore is function if enabled that would allow you to restore your system to previous date. The restore will wipe out all the programs and settings performed after the selected restore date. It does not delete personal data such as documents and pictures stored on your computer.
To restore your Windows 7 computer to previous date, follow the instructions below:
1) Click
Start and type
Restore in the Windows Search box.
2) In the list of results, click on
System Restore. You can also access
System Restore from Start->All Programs->System Tools ->System Restore

3) In the
Restore System Files and Settings dialog box, choose
suggested restore date or choose
different restore date then click next

4) In the next dialog box, check off
Show more restore points and choose a desired restore point and click next

5) Click
Finish and your computer will restore its settings to selected restore date. The system will automatically reboot during the restoration.

See how to
turn on or enable Windows restore point