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Try:
Reference https://forum.kaspersky.com/topic/ms-teams-only-works-when-i-disable-my-kaspersky-35859/?do=findComment&comment=144325
There is a suspicion that this is an old bug that has already been fixed in new versions.
Please try this solution:
- Open Kaspersky app, selectSettings⚙, selectGeneral, uncheck Enable Self-Defense, select Save, select Yes - to confirm the action.
- ExitKaspersky app - on the Windows taskbar or hidden icons, rightclick the Kaspersky icon, select Exit.
- Go to folder *C:\ProgramData\Kaspersky Lab\AVP21.3\Report* and delete the contents = all files and folders.
- StartKaspersky app.
- Enable Self-Defense.
- Restart your computer and check the issue
Another solution: Reinstall Kaspersky Total Security antivirus without saving data