CU version update: Windows Defender Security Center does not open.

Pulcinella · 11 Apr 2017

Updated to CU via Update Assistant. I had to start the process 3 time but in the end all went fine. Got the latest updates installed too.
Trying to open Windows Defender in Security Center (the only way to open WD it seems) and the blue screen with WD logo appears only for few second, then nothing happen.
I cannot scan file using WD explorer feature neither.
System & Security report that WD is on. No issues.

Anybody care to chip in, that would be much appreciated.

MikeMecanic · 11 Apr 2017

The old user interface was working here after upgrading, but freezes for about 30 Sec. I'm not using the old Defender app, there is a new one now. We hope that this may help:
Defender UI Delayed: Not responding build 15063.13 - - Windows 10 Forums

Pulcinella · 11 Apr 2017

MikeMecanic said:

The old user interface was working here after upgrading, but freezes for about 30 Sec. I'm not using the old Defender app, there is a new one now. We hope that this may help:
Defender UI Delayed: Not responding build 15063.13 - - Windows 10 Forums

@Mike
it is not a case of delayed UI for me, WD just does not open even if I wait till the cows come home.
Appreciate the help though.

Bree · 11 Apr 2017

Pulcinella said:

it is not a case of delayed UI for me, WD just does not open even if I wait till the cows come home.
Appreciate the help though.

The old Defender UI opens for me in the Creators Update, but it does take its time - up to a minute. If you really must use it then this tutorial tells you how...
Create Windows Defender Antivirus Shortcut in Windows 10

...but you really shouldn't need it. Most everything it did is now available through the Defender Security Center, plus a lot more.
Open Windows Defender Security Center in Windows 10

Pulcinella said:

Trying to open Windows Defender in Security Center (the only way to open WD it seems) and the blue screen with WD logo appears only for few second, then nothing happen..

@Pulcinella, there appears to be some confusion here. You don't need or want the old green Defender UI, all its functions are in the Defender Security Center now - quick scan, advanced scan, check for updates, scan history, quarantined items etc.. The quick way to open the Security Center is right-click on the Defender icon in the notification area and select 'Open'.

If you mean the Security Center itself appears briefly then disappears, then it may need re-registering. Do any other built-in modern apps briefly flash and disappear?

Reinstall and Re-register Apps in Windows 10

Pulcinella · 11 Apr 2017

If you mean the Security Center itself appears briefly then disappears, then it may need re-registering. Do any other built-in modern apps briefly flash and disappear?

Reinstall and Re-register Apps in Windows 10[/QUOTE]

Correct. Did a refresh already. WD Security Center did work for an hour or so, then the same issue happened.
I only reinstalled MBAE free, and HMP free, this one app to run a quick scan at start up.
There maybe a conflict here, just guessing though.
Changed HMP settings, on demand only now, and stopped MBAE protection.
NO changes. I'll try to uninstall those to Apps and report.

Pulcinella · 11 Apr 2017

WD Security Center does work now that I do not have any other Security Apps installed. Finger Crossed...

Pulcinella · 12 Apr 2017

Ref post #6
CU Windows Defender and its Security Center does not seems to take third party security apps kindly.
IMO It should not be so.

Airider · 22 May 2017

I use Kaspersky and now for some days RansomFree too. The Windows Defender through Settings works fine with them .....but several times the only way to get Windows Defenders Security Center and thus Windows Defender Anti-Virus options (important for ME to get Periodic Scanning, since I will NOT run the computer without Kaspersky on FULLTIME) .... is System Restore, and then maybe only day back, since CU came in more than a week ago.

YAY, System Restore!