Hi MezcalC
1
Right click your Start Button, choose Powershell (admin)
Paste this command into Powershell and hit Enter:
net stop wuauserv
Leave Powershell open
2
Open Windows File Explorer, then navigate to this folder:
C:\Windows\SoftwareDistribution\Download
Delete the contents of that folder
Then navigate to your C drive, do you see a WindowsUpdate folder there, delete that
3
Back in Powershell, paste this command and hit Enter:
net start wuauserv
Close Powershell
4
Please post a screenshot of your C drive, I just need to check for other folders there .. .