Sims 4 Studio Antivirus Issue

Hi. Windows has a build-in antivirus but it is most likely not it. You can still add it to exceptions to Windows defender.

In the past it used to be the antivirus that would not let s4s reach its own log files, now it’s the system as a whole. The log files are on the c drive, same drive where the system files are, so everything has limited permission to modify files there.
Do this to s4s installation folder and the one in the documents
answers.microsoft.com/en-us/windows/forum/all/windows-10-grant-a-specific-application-permanent/7e80d9ca-6e3b-4d5c-bb52-ac9adcd4e5ec