Hello, I’m Virginia, a fellow user like yourself.
Sorry to hear you’re experiencing problems. May I ask which Windows 10/11 build are you running - 22H2 (Win 10/Win 11) or 23H2 (Win 11)?
I understand you’re having problems with calibrating a touchscreen, Don’t worry as I’ll do my best to assist you today.
If you open the old Control Panel (you may need to search the pc for this) & click on Hardware & Sound>Tablet PC settings & click Calibrate, then Display Options & follow instructions does this work?
If this is a monitor rather than a laptop/tablet pc then what’s the make & model?