Windows 8.1 a little black screen

A couple months ago i upgraded to 8.1 and since then, before the lock screen, a little blank screen pops out, this lasts like 10-15 seconds every time. Also there are moments when this doesn't occur. I can use my computer fine, but, i wonder how can i fix that because sometimes, when i'm in a hurry, this seems an eternity for me.

Also, thanks for putting time into reading my post.

March 28th, 2015 8:15am

RI

We need a lot more information can you give us a screenshot of it?  Just as a start I would suggest you run a malwarebytes scan and a system file check

Please download the free version of Malwarebytes. Update it immediately.
Do a full system scan
Let us know the results at the end.

http://www.malwarebytes.org/products


Please run a system file check (SFC) & DISM if you are on win 8 or higher
All instructions are in our Wiki article below...
Should you have any questions please ask us.

System file check (SFC) Scan and Repair System Files

Free Windows Admin Tool Kit Click here and download it now
March 28th, 2015 8:18am

before the lock screen, a little blank screen pops out

That sounds like the lock screen before getting to the login screen.  You can customize the lock screen so what have you done with it?

In fact it may also help to know more details about what machine this is happening on because it may also describe the camera screen popping up unexpectedly.   Have you checked your Snapshots directory?  <eg>

BTW now that I am trying to get the feature that I was thinking of to show, it won't. I probably turned it off somehow and now can't remember how.   (On Surface 2 RT).

March 28th, 2015 10:53am

Hi Rares,

Considering this issue may be related to the display driver ,we can try to reinstall the dispaly adapter to have a check .

To get a better performance of the machine ,please always keep it up to date .

Please also check the following and compare your symptom with it :

Black screen after swiping up and down on Windows 8.1 lock screen

http://support.microsoft.com/en-us/kb/3032312

Best r

Free Windows Admin Tool Kit Click here and download it now
March 31st, 2015 3:32am

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