In order to install Bitdefender Security on systems with Windows 7 Service Pack 1, several Microsoft Knowledge Base packages need to be present on the device.

You can install them via Windows Update or manually install those specific packages.

Install using Windows Update

Press the Windows Start    button, select All programs, go to Windows Update and Check for updates.

Make sure your device is updated.

Manual install

• Download and install KB4490628 – http://download.windowsupdate.com/c/msdownload/update/software/secu/2019/03/windows6.1-kb4490628-x86_3cdb3df55b9cd7ef7fcb24fc4e237ea287ad0992.msu

• Download and install KB4474419 – http://download.windowsupdate.com/c/msdownload/update/software/secu/2019/09/windows6.1-kb4474419-v3-x86_0f687d50402790f340087c576886501b3223bec6.msu

Source : Official Bitdefender Brand
Editor by : BEST Antivirus KBS Team

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