Hi Sloane. I'm Greg, an installation specialist and 9 year Windows MVP here to help you.
You do not need to start a new thread to add to your old one. Just click on the email notification email's big blue Reply button to go to your thread, or sign into Microsoft Community to click on your Profile icon at top right on every page, choose Profile and scroll down to find your active thread.
Try the fixes here first:
https://ugetfix.com/ask/how-to-fix-the-semaphor...
See marked Answer in this thread for the error:
https://answers.microsoft.com/en-us/windows/for...
I hope this helps. Feel free to ask back any questions and keep me posted. If you'll wait to rate whether my post helped you, I will keep working with you until it's resolved.
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