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Restart your computer. Turn on your computer so that Windows starts normally, insert the Windows 7 installation disc or USB flash drive, and then shut down your computer. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. Restart then press F2 Part 1. I will share a simple tweak to format Windows 7 without any external device. That will open up and you should see several programs. Double-click on … The CD-ROM needs a power supply to operate hence you need to open your computer first. Include your email address to get a message when this question is answered.By using this service, some information may be shared with YouTube.All tip submissions are carefully reviewed before being publishedFormatting does not erase all the contents of a hard drive securely. This completes the walkthough happy formatting and good luck!Make sure to make a backup of your files if formatting a disk that had a previous installation of Windows or personal dataFormatting the hard drive will erase all files on the drive and they will not be recoverable. Formatting the Hard Drive Without Reinstalling Windows 7{"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/f2\/Reformat-Windows-7-Step-1.jpg\/v4-460px-Reformat-Windows-7-Step-1.jpg","bigUrl":"\/images\/thumb\/f\/f2\/Reformat-Windows-7-Step-1.jpg\/aid3354401-v4-728px-Reformat-Windows-7-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"