On my work computer, I accidentally turned off the (don't show again} clipboard dialog box. From what I can find there is no option to simply turn it back on!

So i have a workbook that I copy and paste from all day long. About a month ago the workbook crashed {I tried to repair but the issue remains} and ever since then, several times a day, I get the pop up stated there was an error copying from the workbook, BTW it's only this one. So what I'll do is clear the clipboard to proceed. Without having this pop up I will just waste time when I'm pasting the info elsewhere not knowing it didn't copy. Not only is this going to be a time waste but it's going to dry be nuts!

From what I found, this is something that basically needs to be fixed in regedit. Being a work computer I don't believe I will have access to the regedit or to reinstall Excel.

Any suggestions on this is appreciated!

Thanks,
Phil

I found this:

Short version: there’s no friendly toggle for that. When you clicked “Don’t show this again,” Excel stored it in your user settings. To get the clipboard error dialog back, you have to reset Excel’s user options (registry). Here’s the clean way:

Reset Excel’s suppressed dialogs (safe, blunt fix)

Close Excel (all instances).

Press Win+R, type regedit, press Enter.

Go to:
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Excel
(If you’re on an older Office: 15.0 = 2013, 14.0 = 2010.)

Right-click “Excel” → Export (this is your backup).

Right-click “Excel” → Rename → Excel.old.

Open Excel again. It rebuilds defaults and brings back all “Don’t show again” pop-ups, including clipboard ones.
Microsoft Learn

Why this works: Microsoft doesn’t expose a UI switch to undo individual “don’t show again” prompts; restoring them typically requires changing/resetting registry values.