4/5/21 · If you want to remove virus and malware or going to use the same system (or hard drive) after reinstalling Windows or any other OS, you can use Disk management tool or a system repair disc to format Windows 10 Follow these steps to format nonsystem hard drive volumes or disk using Disk Management Press 'WindowsR', type diskmgmtmsc and hit 'Enter' Rightclick on the volume other than C and select 'Format6/18/16 · Put the steamapps folder in the external drive and disconnect it Format and reinstall Windows and get all drivers and Windows itself updated Install Steam, get the code from your email that authorizes Steam to be used on that new installation of Windows, then put the steamapps folder back in the Steam folder after you get Steam installed12/11/10 · Having recognized the need to format and reinstall Windows, the article explains into detail how to format a hard disk from Windows installation disc This can be applied when installing a new copy of Window