Mr. Android said in A simple request.:
Windows 7 cannot be supported as some of the technology we use simply isn't made for Windows 7. Plus on MW3 the performance improvements are specifically from removing Windows 7 related stuff.
Apologies but this isn't possible to do on Plutonium.
Exactly this, with the performance fixes for MW3, Windows 7 will simply not work anymore. The performance were caused by old code during Windows 7 era. You should really just update your PC and use a newer OS. We're not giving support for Windows 7 users, simply because Microsoft does not do so either. If we have to support Windows 7, we simply cannot build cool new features that will only work with newer versions of Windows. Either update your machine or don't play Plutonium.
/locked