You go to Start>All Programs>Accessories>System Tools>System Restore
Given that System Restore was turned on you would be able to select from different "Restore Points" in which to restore your PC to that time to help undo any harmful changes you may have made.
Take note that this does not always fix the problem and can be undone anytime.
System Restore.
System Restore
Use system restore, failing that reinstall M.E.
You can use a backup option, to restore from backup. Or to use one of restore points. Start->Accessories->System Tools->Backup. Or you can use the installation CD, then boot up in repair console.
There are various ways through which you can repair Windows XP. You can format your device and reinstall the software or use the system restore function in the operating system.
In order to restore a Dell Latitude D800 to its factory settings without discs or downloads, you can use the system restore function in the Windows operating system. You can also use the preinstalled system restore utility that comes with your laptop.
Backup and restore
if you use a tool that comes with windows 7 called system restore you can pick a date to restore your computers settings to the way they were on that date. your files don't get effected by this
If you can't boot into Windows at all, then follow this paragraph When you start your computer , just after BIOS checked your hardware, press and keep pressed the key F8. Eventually you will see menu which will ask you which mode you want to use. Press "r" for recovery mode. If you can load Windows but things aren't working quite right, then follow these steps: Click Start, All Programs, Accessories, System Tools, System Restore, and choose "Restore my Computer...." The System Restore feature of Windows XP is used to return your computer to an earlier saved state without losing any data files if you have system problems or other failures with your computer. System Restore will take an image of your computer at a given place in time and save it as a restore point.
Windows Restoration restores your computer settings to that date you are restoring. It only restore the settings and there is no effect on the data. To do restoration:Click on Start -> Run and then enter "Msconfig" and press enter. It will open a configuration utility window.In general tab, you will find the "Launch System Restore". Click on it. It will open a window from where you can select the available dates to restore your windows. The available date will show in Bold letters.To use system restore, your drive must be system restore enabled. To check that, Right click on My Computer -> Properties. Click on System Restore tab and there you can see the drive which is enable for system restore. The status of a drive should be "Monitoring".
Use the windows restore software automatically included in the packaging.
THe backup and the restore wizards