Copy the Opera 22 profile to a flash drive, or out in the cloud somewhere if you have that capacity. Then reinstall Windows, reinstall Opera 22, and copy into the profile of the Opera 22 you have just installed, the parts of the Opera profile you saved in the flash drive (or in the cloud) -- like the Bookmarks, Speed Dial, Extensions, etc. To find the location of your Opera Profile in your computer, click on the Opera Menu, and About Opera. The Opera Profile is called "Opera Stable."
This should work. The best of luck to you!