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Black window that opened and closed immediately

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Sakura_01 Posted messages 118 Registration date   Status Member Last intervention   -  
bazfile Posted messages 58530 Registration date   Status Moderator Last intervention   -

Hello,

I was just quietly on my PC when a small window with a black background opened by itself and disappeared automatically after one or two seconds max.
I didn't have time to see anything, just that it was about C and Program Files I believe, and I also think the window was empty but I'm not sure anymore.

In doubt, I ran FRST, because I'm surprised by this micro appearance. The PC has been on for several hours and apparently, there are no background updates (usually the PC makes a bit of noise when that happens).

Report for Addition

https://pjjoint.malekal.com/files.php?id=20250704_z6u9z13n7u5

Report for FRST

https://pjjoint.malekal.com/files.php?id=FRST_20250704_h9r7h12v11k6

Thanks in advance if someone can enlighten me.


3 answers

  1.
    bazfile Posted messages 58530 Registration date   Status Moderator Last intervention   20 283
     

    Hello @Sakura_01 StatusMember.

    Still no infection on your PC.

    Too many extensions in Firefox, some of which are duplicates, do a bit of cleaning up.

    bazfile
    Moderator/Security Contributor.
    A hello, a reply, a thank you are always appreciated.

    1
    1. Sakura_01 Posted messages 118 Registration date   Status Member Last intervention   3
       

      Thanks, phew :)

      What about extensions like Adblock Plus and the others? If I only keep one, I don't feel like it blocks all the ads well, or should I delete this one and keep AdGuard Adblocker and uBlock Origin?

      I can remove HTTPS Everywhere without any problem.

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      1. bazfile Posted messages 58530 Registration date   Status Moderator Last intervention   20 283 > Sakura_01 Posted messages 118 Registration date   Status Member Last intervention  
         

        As for extensions, it's up to you; a browser with too many extensions is often slowed down, that's why I mentioned that. It's for you to decide which ones you don't need. Your PC is not infected, and that's all that matters.

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      2. Sakura_01 Posted messages 118 Registration date   Status Member Last intervention   3 > bazfile Posted messages 58530 Registration date   Status Moderator Last intervention  
         

        I haven't noticed any slowdown, let's hope it lasts.
        It's good that there's nothing, we thought about that (virus) because often a change of this type with memory and PC noise can be due to that (but since I haven't done anything specific...) and when I go into Task Manager, the Antimalware Service Executable is in Very High mode in red, it runs quite a bit when the PC makes its noise (but no slowdown noted either on the Internet or in using the PC).

        In searching for what it is, a lot of info points toward the risk of viruses/malware. I don't have any other antivirus installed, and other info tends toward something corrupted in WinDefender or an analysis that is too resource-intensive.

        Thank you very much once again :) have a good evening.

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      3. bazfile Posted messages 58530 Registration date   Status Moderator Last intervention   20 283 > Sakura_01 Posted messages 118 Registration date   Status Member Last intervention  
         

        @+ on CCM.

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  2. bazfile Posted messages 58530 Registration date   Status Moderator Last intervention   20 283
     

    Hello @Sakura_01 StatusMember.

    Nothing unusual, your PC is not infected.

    bazfile
    Moderator/Security Contributor.
    A hello, a response, a thank you are always appreciated.

    0
    1. Sakura_01 Posted messages 118 Registration date   Status Member Last intervention   3
       

      Thank you very much :) !

      What could that be coming from then? A sort of update that didn't go well after all?

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      1. bazfile Posted messages 58530 Registration date   Status Moderator Last intervention   20 283 > Sakura_01 Posted messages 118 Registration date   Status Member Last intervention  
         

        It is very common and can come from different sources such as software or a driver, there is no infection on your PC, you can use it without any problem.

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      2. Sakura_01 Posted messages 118 Registration date   Status Member Last intervention   3 > bazfile Posted messages 58530 Registration date   Status Moderator Last intervention  
         

        Okay no problem thanks. Can I delete FRST and everything that goes with it?

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      3. bazfile Posted messages 58530 Registration date   Status Moderator Last intervention   20 283 > Sakura_01 Posted messages 118 Registration date   Status Member Last intervention  
         

        @Sakura_01 StatusMember .

        Uninstall FRST, rename the FRST file you downloaded to uninstall, then once the file is renamed, open it; the uninstallation will proceed automatically via a restart of the PC.

        1
  3. Sakura_01 Posted messages 118 Registration date   Status Member Last intervention   3
     

    Hello. Here I am again already. I hope that by seeing the topic brought up you'll stop by :)

    We'll see if it's related to the C drive that's struggling (checking little by little) or if unfortunately it's something else.
    I've lost a huge amount of space for no real reason on the C drive of the PC between yesterday and today, but it's not lagging.
    Just by letting FRST analyze the PC, without doing anything else, I gained almost 21 GB on the C drive. No infections to report still please?
    Outside of the forum, I was suggested that the presence of a virus might be causing the PC to behave this way.

    Thank you in advance if you stop by.

    FRST: https://pjjoint.malekal.com/files.php?id=FRST_20250722_t14m8r156l15

    Addition: https://pjjoint.malekal.com/files.php?id=20250722_r5o15h15t5x5

    Have a nice evening.

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