Can not automaticly block TecentQQ access to camera, even if I set avp block all program access camera.

[xzz123]

<p><strong>Reproduction steps:</strong></p>
<p><span></span>Check the option ' block access to webcam for all apps'</p>
<p>start windows UWP app ' camera', try take a picture</p>
<p>start tencent QQ, show camera preview in its sitting</p>
<p>in the Green notification box, choose block this app access to camera</p>
<p></p>
<p><strong>Actual result:</strong></p>
<p><span></span>UWP camera app report that it do not have access to camera</p>
<p>but QQ success show camera image</p>
<p>after manual block access to camera, QQ can not show camera preview anymore</p>
<p></p>
<p><strong>Expected Result:</strong></p>
<p><span></span>QQ can not show camera preview.</p>
<p></p>
<p>I have upload traces and reproduce video.</p>
<p><a href="https://cloud.qainfo.ru/s/gEhDffeO3wyqPt6" target="_blank" rel="noopener">https://cloud.qainfo.ru/s/gEhDffeO3wyqPt6</a></p>
<p></p>
<p>Windows10 17134.285 x64</p>
<p>KTS19.0.0.1088(c)</p>
<p></p>
<p>Similar problem to support case INC000008572247 and possible it is Bug 2484338:[SUPPORT] Webcam protection doesn't work on integrated webcam.</p>

[xzz123]

<p>It is highly likely that patch K for 2018 product also share the same problem.</p>

[Stepan.Korchagin]

<p>Is that issue also actual for 2020?</p>
<p>Looks like it is not patch issue, because it also present for 2018</p>

[xzz123]

<p>@stepan-korchagin</p>
<p>No, can not reproduce in 2020</p>
<p>but in previews patch for 2018, there is no problem. Also no problem in 2019 patch A.</p>
<p>One day, I remember, after update of patch B for 2019, webcam protection became useless for all program, not just QQ.　</p>
<p>After patchC fix the issue( this was mentioned in release note of patchC), only blocking QQ use camera become a problem.</p>
<p>Webcam protection useless for QQ is not a new bug, I reprot such problem to support approximately a year ago.</p>
<p></p>

[Stepan.Korchagin]

<p>@xzz123can it be result of QQ update? Can you check it for patch B or A now?</p>

[xzz123]

<p>@stepan-korchagin</p>
<p>May take quite a long time.</p>
<p>I believe I should have given you the report next day...</p>

[xzz123]

<p>@stepan-korchagin</p>
<p>I did a quick test</p>
<p>OS windows10 RS4 17134.286 x64</p>
<p>all test are performed in above OS.</p>
<p></p>
<p>KIS19.0.0.1088 (a) en-us</p>
<p>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')</p>
<p>QQ: block and show green window both work fine. no problem</p>
<p></p>
<p>KIS19.0.0.1088(b)</p>
<p>uwp camera program: same above, fail to block. fail to capture the activaty using camera.</p>
<p>QQ: block and show green window both work fine. no problem.</p>

[xzz123]

This post is deleted!

[xzz123]

This post is deleted!

[xzz123]

This post is deleted!

[xzz123]

This post is deleted!

[xzz123]

<p>update to patch C again</p>
<p>It is miracle that I cannot reproduce again.</p>
<p>webcam protection work fine on uwp camera app and QQ.</p>
<p>I do not know why, but the problem is no more reproduced.......</p>

[xzz123]

<p>I reboot soemtimes</p>
<p>result is the same.</p>
<p>cannot figure out waht made my last installation malfunction.......</p>

[Egor.Pokrovsky]

<p>thank you for fast answer</p>