@DiapDealer - I would avoid putting things in Documents, because unless you tell it not to Onedrive will auto-synch that folder to the MS cloud.
Might be better to create a fresh folder in the home folder e.g. c:\users\BR\SigilTest, and subfolders in that - e.g. c:\users\BR\SigilTest\Program and c:\users\BR\SigilTest\Temp. Safer to undo too, just nuke c:\users\BR\SigilTest\
@KevinH - on Windows you can set programs to auto-start for all users, the default location for the shortcuts is C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp - so, check to ensure its empty.
BR