For anyone else facing this issue, I found a YouTube video here: https://www.youtube.com/watch?v=9AZGegx9ews.
I didn't want to reset my PC, so I opened up command prompt as admin. Ran the command 'sfc /scannow', let it do it's thing, and then restarted Windows. After the reboot, File Explorer was up and running again. Not sure if this will work for everyone, but it worked for me.
thankyou! it actually helped me a lot .