Microsoft’s official recommendation <https://github.com/MicrosoftDocs/OfficeDocs-SkypeForBusiness/blob/9df8f4069848c52ae810719e4baf171014b01452/Teams/teams-files-folders-antivirus-perf.md> for improving the performance of Teams on Windows is to exclude it from antivirus checks: Add the following Teams programs to your antivirus safe list. %localappdata%\Microsoft\Teams\current\Teams.exe %localappdata%\Microsoft\Teams\Update.exe Add the following Teams folders to your antivirus safe list. %localappdata%\Microsoft\Teams %appdata%\Microsoft\Teams| Because antivirus software only exists to slow your system down, right? (Found from this <https://forums.theregister.com/forum/all/2021/07/12/windows_11_still_doesnt_understand/#c_4292299> reader comment.)