An update on her applicationς Windows Defender (virus definition update) released by Microsoft this week breaks Security Essentials and Windows Defender in Windows 7 and 8.1, according to reports.
This particular update adds digital signatures of new viruses (version 1.289.1521.0) to Microsoft's security application, but it seems to have done more harm than good. Too many users confirm that after installing this version, real-time protection is disabled and Windows security applications warn that the updates malware is out of date.
If you try to perform a manual scan on the computers that installed the update, it will fail by displaying the 0x800106ba error. So neither Microsoft Security Essentials nor Windows Defender can detect and remove malware.
According to Mary Jo Foley by ZDNet, Windows 10 is not affected by the error and Windows Defender is running correctly on this version of the operating system.
Microsoft acknowledged the problem and said it is promoting a new update to fix it. However, the company claims that only Windows 7 and Windows Server 2008 are affected, although there are many reports also for Windows 8.1 devices.
The company has not officially stated that the virus definition update is the fault, but the new version is 1.289.1588.0.
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- Restore Windows 10 to factory settings and delete all data
- Windows 7 update to continue with updates