Even in the administrator account, you should run the installer via right-click “Run as administrator”.
(1) ALL the folders from:
"C:\Users\Administrator\AppData\Roaming\SketchUp\SketchUp 2018"
… (that are created during SketchUp install or upon first SketchUp run,) need to be copied (or moved) to:
"C:\Users\Default\AppData\Roaming\SketchUp\SketchUp 2018"
(2) IF you had run SketchUp in the Administrator account, and wished to propagate any saved settings, styles, toolbar layouts, window locations, etc., … then the Registry keys and attributes at:
"HKEY_CURRENT_USER\Software\SketchUp\SketchUp 2018\"
… need to be copied to:
"HKEY_USERS\.DEFAULT\Software\SketchUp\SketchUp 2018\"
Then after sysprepping … whenever a new user account is created, the folders, shortcuts, start menu, and registry keys are COPIED from the “Default” user account to the newly created account.
I’d also suggest pre-installing the patch for Windows 10 slow selection, …
… and (if your machines have dedicated GPUs,) see if you can set the machine to use the high performance GPU rather than the integrated Intel graphics so each user doesn’t need to deal with this.