| For Windows, it’s ‘squirrel away time’ Sometimes Windows updates just don’t work, and a Microsoft-recommended “sfc /scannow” or DISM command won’t help. So what’s a prudent Windows user to do? It’s that semi-annual time of the year we in AskWoody land call “squirrel away time” — time to make sure you have a copy of the ISO currently installed on your computer in case you need to reinstall it. There are a number of ways to get older versions of Windows by using a trick publicized on the Thurrott.com site. But the easiest way to grab a copy of, say, 20H2 is to go to the software download site, download a copy and store it on a spare hard drive, flash drive or external USB drive.