Fix stuck windows and not working alt+tab keys in Vista

If you get a ghost of a window stuck above all the other windows, or if Alt+Tab doesnt work suddenly, you can try the following:

1. Press Ctrl+Alt+Delete
2. Start task manager > Processes tab
3. Find explorer.exe and end the process
4. If there are still bits stuck, end dwm.exe (desktop window manager)
5. Go to Applications tab > New Task. Type in "explorer" and press Ok

Hopefully that helps