Can I try reinstalling Windows if my computer loses power during installation?

If your computer loses power during installation, Windows will attempt to revert to your current operating system. You can continue to use your current version of Windows, but some features might not work.

Before you try to install Windows again, troubleshoot and eliminate the problems that might have caused your computer to lose power. Check power cables and power strips and replace any faulty parts. After you have done this, try installing Windows 7 again, and choose a custom installation (an installation that automatically replaces your existing version of Windows).

Warning

• A custom installation deletes all of your settings and programs. Be sure to back up your files before you begin. After the installation is complete, you must manually reinstall your programs, and restore the files you backed up. For more information, see Installing and reinstalling Windows‍‍.