How can I change the display settings back to original settings?

Hi DrCTW -

I'm Jerico T., I understand that you're having some issues right now and I'd be more than happy to help you today.

Please try to perform the steps below.

1. Open settings by pressing windows key + I
2. Select System
3. On the left pane select Display
4. Under Scale and layout, click the drop down menu and select the Recommended scale
5. Under Display Resolution, click the drop down menu and select the Recommended resolution
6. Save all changes, restart your computer if necessary and check if the issue is fixed

If in case the issue still persist, please perform system restore.

System Restore
- System restore is where it will take your computer settings back to an earlier point in time where everything is working fine.

1. Open the run box by pressing Windows Key + R and type rstrui.exe then press enter.
2. System restore windows will open. Normally it will suggest a restore point(Sometimes it doesn't), if it does, select the 2nd option to select more restore points.
3. Select your desired restore point date and time.
4. Once selected, hit next and finish.

Windows will restart itself to start system restore. System restore might take some time to complete and it is very important that system restore must not be interrupted during restore process as it might damaged the operating system. System restore will take at least 20 minutes or more depending on the content of the computer and the changes on the settings that was done prior to the date selected. System restore will also removed application , updates and drivers installed prior to the date selected.

DISCLAIMER:
System Restore is a recovery tool for Windows that allows you to reverse certain kinds of changes made to the operating system. System Restore is used to return important Windows files and settings—like drivers, registry keys, system files, installed programs, and more—back to previous versions and settings. Being said all applications and changes made prior to the date selected will be removed and needs to be re-installed if its needed.

Feel free to reach back if you need any further assistance.

Hope this help. Have a good day.

Thank you,
Jerico T.