I suspect Parallels Desktop Tools need to be updated for Creator's Update, and the next September update. After installing the new update, I have tried reinstalling Parallels Tools 3 times, following the troubleshooting steps and removing the registry keys, temp files, and program files. Each time I can only use the keys in the Edge browser or Powershell but not on the start menu. I used Cortana to open Edge. The start menu blinks a few times before opening with the mouse. I am going to try a powershell fix next, but it should not be this difficult. I recommended Parallels to 2 companies based on Windows 7 stability. Windows 10 changes too frequently and parallels Toolbox should be updated to match.