Here, I did this and it worked.
1. Have you downloaded any mysterious map packs, like Nurple and such?
2. If you did delete every map pack you downloaded, or if your sure that you know which one, and did it say Game version incompatible right when you extracted something to your RA2 directory? Then delete it.
3. If that still doesn't work, DELETE your westwood folder, if you can't delete it go to your search bar, type in westwood, and delete it.
4. Open up your control panel, go to Programs and features or whatever it says.
5. Uninstall C&C Red alert 2, and Yuri's revenge.
6. Uninstall Westwood components.
7. Reinstall everything.
8. Log on and play, it should not say Game version Incompatible anymore.
Lets hope this works.
If it worked for me, it should work for you.
Be more careful of what you dl to your RA2 directory.
