If you can start Windows
These tools and methods can help you roll back your system to an earlier state, and help ensure your computer has the latest updates installed.
Open System Restore
- Open System Restore by clicking the Start button Picture of the Start button . In the search box, type System Restore. Next, in the list of results, click System Restore.If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
- Follow the instructions on your screen.
If you can't start Windows at all
- If you use a Tablet PC or other computer with a touchscreen, you might need to connect a keyboard and mouse in order to use Startup Repair and the other tools in the System Recovery Options menu. For more information, see What are the system recovery options in Windows 7?
- If Windows 7 came preinstalled on your computer, your computer manufacturer might have included other recovery options. For more information, refer to the documentation that came with your computer, or go to the manufacturer's website.
Start your computer in safe mode
- Remove all CDs, DVDs, and other media from your computer, then restart it. Click the Start button , click the arrow next to the Shut Down button, and then click Restart.
- Do one of the following:
- If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you'll need to try again by waiting until the Windows logon prompt appears, and then shutting down and restarting your computer.
- If your computer has more than one operating system, use the arrow keys to highlight the operating system you want to start in safe mode, and then press F8.
- On the Advanced Boot Options screen, use the arrow keys to highlight the safe mode option you want, and then press Enter. For more information about options, see Advanced startup options (including safe mode).
- Log on to your computer with a user account that has administrator rights.
When your computer is in safe mode, you'll see the words Safe Mode in the corners of your screen. To exit safe mode, restart your computer and let Windows start normally.