Uninstall Sophos Antivirus:
1. open settings:
2. open apps:
3. uninstall Sophos and the associated Sophos programmes: Local administrator rights are required to uninstall each of the programmes. Wait between uninstallations until the app disappears from the page. This may take a moment. After uninstalling „Sophos Anti-Virus“, a pop-up should normally appear at the bottom right of the screen with the message that Windows Defender has been reactivated.
4. open Windows Security:
5. check Windows Defender and reactivate if necessary: Windows Defender is already activated in the following image. Only the ransomware protection and the reliability-based protection under App & Browser Control are deactivated. Ransomware only offers passive protection by storing important documents in the Microsoft cloud. Reliability-based protection is disabled by default for normal Windows 10 consumer accounts, but enabled for enterprise customers. (see also https://support.microsoft.com/de-de/windows/sch%C3%BCtzen-sie-ihren-pc-vor-potenziell-unsicheren-anwendungen-c7668a25-174e-3b78-0191-faf0607f7a6e)
6 Check for updates for Windows Defender Windows Defender may not have updated automatically while Sophos antivirus was installed. It is therefore recommended that you check for updates.
7. activate reliability-based protection This again requires administrator rights.
Deutsche Version: Sophos deinstallieren (Windows)