Some customers are getting an “Unable to log into Microsoft Defender” error on Home windows 11 after the August 2023 cumulative replace, which resolved SSD points. To not be confused with the Home windows Safety app, Microsoft Defender is a brand new app that acts as a safety dashboard for all related gadgets.
Microsoft has been mechanically putting in the safety dashboard Microsoft Defender app on Home windows gadgets with Microsoft 365 subscriptions. Because of this, many customers have already got the app put in, and so they’re now working into an “Unable to log into Microsoft Defender” error once they open the app.
The error is probably going linked to the 2 updates launched on August 8 – the Microsoft Defender replace and Home windows 11 KB5029263, the safety replace inflicting points. I’ve obtained a number of studies from our readers, together with a screenshot displaying the login error message when launching Defender.
Unable to log into Microsoft Defender error attributable to August 2023 safety updates
Customers have additionally highlighted the issue on Suggestions Hub, with most Home windows 11 customers blaming the August 2023 Patch Tuesday and a few claiming the difficulty is attributable to the Defender replace.
“After putting in (KB5029263), MS Defender requested for a login. I supplied my Stay ID credentials, and it mentioned it couldn’t log me in with the message “Unable to log into Microsoft Defender”. That’s an issue”,” a pissed off consumer famous.
“We put in the next updates throughout our gadgets within the firm: 2023-08 .NET 6.0.21 Safety Replace for x64 Shopper (KB5029688), 2023-08 Cumulative Replace for .NET Framework 3.5 and 4.8.1, model 22H2 for x64 (KB5028948), and 2023-08 Cumulative Replace for Model 22H2 for x64-based Techniques (KB5029263). We’re now unable to log into Microsoft Defender,” one consumer instructed us.
Customers can’t pinpoint which particular replace induced issues with Microsoft Defender as a result of a number of updates got here out on the identical day. Nevertheless, Home windows Newest understands that the difficulty isn’t from the August 2023 Patch however fairly from the Microsoft Defender replace.
In response to our query, a Microsoft help engineer confirmed that the corporate is aware of the difficulty and will probably be fastened through a Home windows Replace or app replace.
As talked about on the outset, Home windows 11’s August replace is inflicting a collection of issues for customers, together with a bug that causes File Explorer to cease working and shut after freezing on the desktop for some time. One other bug prevents updates from putting in with an unhelpful error message.
It’s price noting the software program maker hasn’t acknowledged the studies on a public platform but.