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1-Back up all crucial user files if you are able to do so. If your computer will not burn CDs, use flash drives of 4 GB or higher to store your data and transfer them to another computer. Alternatively, you can use your network to transfer files. You can then back them up to CD at your leisure.
Detach peripheral devices such as removable media drives, USB drives and your printer before recovering. Also remove any additional hard drives by disconnecting the cable from the back. Leave your monitor, mouse and keyboard attached to the computer.
Shut your computer down. Place the first recovery CD in the CD drive. If the computer fails to boot from the CD drive, reboot and enter the setup screen. Change your boot options so that the CD drive is above the hard drive. If your recovery files are written on a partition, you may be able to select system recovery from the splash screen.
Select the recovery option you would like to use. To perform a destructive recovery, click the "Advanced" menu option. Select "Destructive Recovery" and click "Next." To perform a non-destructive or system recovery, simply click "Next" from the opening screen.
Watch the computer while it is recovering to the factory settings. Watch for any errors, as the computer will wait indefinitely for a response from you, slowing down recovery time. Also, you may need to insert the additional recovery CDs as the recovery program requests them.
Restart the computer in diagnostic mode if you experience crashes. These errors are most likely to occur after running a non-destructive recovery. To get to diagnostic startup, click "Start" then "Run." Type "msconfig" in the box. Click the radio button next to Diagnostic Startup: Load basic devices and services only. Click the "Restart" button when prompted by the computer. Reinstall any software programs which didn't come with your computer, and uninstall unneeded programs. If you cannot get into the configuration utility, shut the computer down, and press "F8" to get into troubleshooting and advanced options. Select "Safe Mode" from the menu and log in as an administrator. Reinstall any software which didn't come with your computer, and uninstall any unneeded programs.