For example, here’s the Windows XP style Alt-Tab being used in Windows 7, which doesn’t use thumbnails like the Windows 7 version does. What we’ll do is use a registry hack courtesy of reader Benjamin. Thanks!
Note: we’re not actually recommending this or saying that it’s better than Windows 7, but it’s an extra option in case you like the old way better. What we do recommend, however, is taking a look at the awesome VistaSwitcher Alt-Tab replacement application. It’s great.
Manual Registry Hack to Enable XP Alt-Tab
Open up regedit.exe through the Start Menu search or run box, and then browse down to the following registry key:
Once you’re there, create a new 32-bit DWORD on the right-hand side, give it the name AltTabSettings, and assign the value as 1.
Once you’ve done so, the Alt-Tab prompt should immediately change to the XP style. To remove and get back to the Windows 7 style, you’ll need to delete the registry key and then log out and back in.
Update: We tested this on Windows 10 and it still works, but you’ll need to sign out and sign back in after performing the registry tweak. Your change won’t take effect until you do.
Downloadable Registry Hack
You can simply download, extract, and then double-click on the XPAltTab.reg file to enter the information into the registry. To remove, use the Windows7AltTab.reg file, and then log out and back in.
Download XPStyle Alt-Tab Registry Hack from howtogeek.com