I reboot soemtimes

result is the same.

cannot figure out waht made my last installation malfunction.......

update to patch C again

It is miracle that I cannot reproduce again.

webcam protection work fine on uwp camera app and QQ.

I do not know why, but the problem is no more reproduced.......

@stepan-korchagin

I did a quick test

OS windows10 RS4 17134.286 x64

all test are performed in above OS.

KIS19.0.0.1088 (a) en-us

uwp camera program: fail to block access to camera using any means.( No green window in screen, also No use if check 'block all app use camera')

QQ: block and show green window both work fine. no problem

KIS19.0.0.1088(b)

uwp camera program: same above, fail to block. fail to capture the activaty using camera.

QQ: block and show green window both work fine. no problem.

@stepan-korchagin

May take quite a long time.

I believe I should have given you the report next day...

@Dmitriy Pisarets 

Hi

Are you rejecting this case? Cause of duplication?

@stepan-korchagin

No, can not reproduce in 2020

but in previews patch for 2018, there is no problem. Also no problem in 2019 patch A.

One day, I remember, after update of patch B for 2019, webcam protection became useless for all program, not just QQ.　

After patchC fix the issue( this was mentioned in release note of patchC), only blocking QQ use camera become a problem.

Webcam protection useless for QQ is not a new bug, I reprot such problem to support approximately a year ago.