how to delete old windows version after upgrading to 10
Indeed, if you simply click the folder and then press the Delete key, Windows will tell you you need permission, yada-yada, etc. Here's the proper way to delete the Windows.old folder: Step 1: Click in Windows' search field, type Cleanup, then click Disk Cleanup.Step 2: Click the Clean up system files button.creenshot by Rick Broida/CNET. Second, unless you're seriously strapped for space on your hard drive, you don't have to do anything: Windows 10 will automatically delete the Windows.old folder one month after you performed your upgrade.