AutoCAD Profile has corrupted and will not load so therefore has to be recreated
- Browse to C:\Users\Username\Appdata\Roaming\Autodesk.
- Rename the folder with the correct version number (i.e. if you're using AutoCAD 2019, rename R23.0)
- Go to File > Run, type in Regedit and press enter to bring up the Registry Editor window.
- From here, browse to HKEY_CURRENT_USER\SOFTWARE\Autodesk\AutoCAD\Version Number\profile folder and rename this folder as shown below.