Step 1). Install AutoHotkey. It's a script interpreter. It will allow you to execute .ahk script files.
Step 2). Copy my script into notepad, and save as EnableWin.ahk
Step 3). Double-click (run) the file EnableWin.ahk
If you don't want to see the green "H" tray icon in your systray, you can add the following line to the top of the script.
#NoTrayIcon