How do you install Windows if you don't have an optical drive? Well, Microsoft are kind enough to help us out with this with the Windows 7 (and 8) USB/DVD Download Tool.

With both of these programs installed, you can then run Windows XP in Windows 7 so that you can continue to use programs that were developed for Windows XP but no longer run in Windows 7.

Windows 10 April 2018 Update: Here's what you can expect Double-click to open the ISO file as a virtual drive in File Explorer, then drag its contents to your recovery drive.