This post isn't by me but was on the MW forums before that site was shut down. Posted here for helping others:
Open up the registry edit; windows key + r and then type in regedit and enter
navigate through HKEY_CURRENT_USER > Software > Microsoft > Windows NT > CurrentVersion > AppCompatFlags > Layers
Click on Layers and if you previous checked the "runasadministrator" box for the game, you should see the address for it on the right side, though you may have to expand the name tab to see the whole thing.
If you didn't set the game up to run as administrator then you will need to add a new key string; just right click in the right side box then hover over new and click string value. The new string will have to be your full address for the game: C:\whatever\the\address\is\sciw.exe
Then right click that and click modify and in the value data type: ~ DISABLETHEMES DISABLEDWM
and that should be it.
I hope it works for everyone and if not I'll try and help as much as i can", "> I figured it out! with the help of google I can now access the bottom item in my inventory without the previous workaround. Here's how to do it in windows 10;