Endless Windows Updating underway

I decided to have Windows update on Parallels, but it has been stuck on the updating screen for several hours or at least half a day. I kept my computer screen on for a while, but that didn't work. I also tried closing and reopening Parallels, but that didn't work either. What should I do?

 

Do you do backups? If you do I would delete the misbehaving VM and copy the VM from the backup disk got your Shared > Parallels folder, open it, and try the backup again.
One general comment about updates -- Independent of whether Windows suggest a Restart, I always check in the Settings > Windows Updates window before I do the Restart to assure that the download is completed. Sometimes (bizzarely) it is not.