Text highlighting not working

hi STLCards2026​ Since the mouse and touchpad work normally in other applications, and keyboard selection still works in Word, it sounds more like a Word-specific issue than a hardware problem.

The fact that an Online Repair fixes it temporarily and the problem returns within minutes is an interesting clue. I'd try starting Word in Safe Mode (Win + R → winword /safe) and see whether text selection continues to work normally.

If it works in Safe Mode, I'd check Word add-ins next, particularly any third-party add-ins. You can disable them under File → Options → Add-ins → COM Add-ins → Go and test again.

I'd also check whether the issue occurs with a completely new blank document. If it does, that helps rule out document-specific formatting or corruption.

If Safe Mode doesn't make a difference, I'd consider creating a temporary new Windows user profile and testing Word there. If the problem doesn't occur in the new profile, that would point toward something in the current Windows/Office user configuration rather than the Office installation itself.

Given that you've already done multiple repairs, I wouldn't keep repeating the Online Repair. The next step is really to identify what changes when the repair temporarily fixes the problem.