Windows 10 May 2020 Update is bugging some users with false security warnings

Windows 10 May 2020 Update is causing problems with Windows Defender, whereby Microsoft's built-in antivirus solution is erroneously and repeatedly flagging up potentially dodgy apps which aren't actually on the PC at all (having been previously removed).

As of the new May 2020 Update, Windows 10 by default now identifies 'potentially unwanted applications' (PUAs, also known as PUPs - 'potentially unwanted programs'), and deals with them, which is all well and good in theory. However, the problem is that when you run a scan with Windows Defender, it's continually picking up on PUAs which have already been dealt with.

So on every single scan, users are reporting that they're getting the same (now non-existent) threats flagged up over and over.

As detailed in the complaints which have appeared on Microsoft's Answers.com support forum (as spotted by Windows Latest), what's happening is that Windows Defender is detecting items in its scan history (previously detected PUAs) as if they were actual PUAs.

And because this is happening over and over, with every scan, it's obviously quite irritating behavior (not to mention a potentially worrying state of affairs to see what might be a whole list of unwanted apps continually detected that the user thought had been removed).

It's not clear if Microsoft is aware of this problem yet, but presumably if the software giant is, it'll hopefully be working on a solution.

Workaround details

Fortunately, there's a workaround detailed by Glen Prouty on Answers.com, which is as follows:

Now reboot Windows 10, and the next time you run a scan with Windows Defender, you should (hopefully) find it doesn't misreport these PUAs as still being present.

Meantime, we await a better solution from Microsoft, as the problem with this workaround is that if new PUAs are encountered in the future, you may have to go through the above process again to ensure they aren't repeatedly flagged up. Make sure you check out our guide on how to fix common Windows 10 May 2020 Update problems for more advice if your PC is misbehaving.

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