Hello KathleenO'Leary1,
I'm John an Independent Advisor and a Microsoft user like you. I'll be happy to assist you today. I understand you have a problem with copy and paste suddenly stopped working.
Kindly try the suggested methods below.
**Restart Windows Explorer
Press Ctrl + Shift + Esc to open Task Manager.
Select the Processes tab.
Scroll down and select Windows Explorer, Right click then select Restart.
**Please try to run SFC and DISM to check for any system errors and corrupted files.
https://support.microsoft.com/en-us/help/402652...
After that, Restart your PC
**Please try checking the link below if it helps.
https://thegeekpage.com/solved-fix-copy-paste-n...
Kindly let me know if this helps or if you have any further concerns.
Sincerely,
John DeV
Independent Advisor
Standard Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.