Backspace, Enter, Shortcuts not working in Text
I'm using InDesign CC 2021 on a Dell Inspiron 15 3000. Out of nowhere several keys stopped working. I can't Backspace to delete text, can't Enter to go to the next line, can't copy and paste and who knows what else. I've searched for answers online and I'm at my wit's end. I have a newsletter coming up and I can't work like this. I uninstalled, deleted the preferences when I did so, and reinstalled. I turned off Windows Defender. I don't know what to try next. Somebody mentioned turning off all your startup apps, but I'm afraid doing so will affect a computer that isn't mine. Does anybody have a suggestion of something else I could try?