Hi James,
I'm Stefano an Independent Advisor, here to help you.
First of all, I suggest you to perform a disk clean-up:
- Open "File Explorer"
- Click on "This PC"
- Right click on "C:"
- Click on "Proprieties"
- Click on "Clean-up disk"
- Click on "Clean up system files"
- Select every option in the list, but not "Download"
- Click on "OK"
Then I suggest you to follow this procedure:
- Type "cmd" in windows search bar
- Right click on "Command Prompt"
- Select "Run as Administrator"
- Type "sfc /scannow" without quote and press ENTER
Please let me know if there are some files corrupted or damaged that can't be repaired.
Once ended try performing a clean boot: