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kindanewtothis4738432
Known Participant
Apr 3, 2019 2:25 AM UTC
Answered

Coresync causes high Explorer.exe CPU usage

I have two machines running Windows 1809 and the latest versions of Adobe CC.

Whether file sync is running or paused, Core Sync causes the Windows Explorer process to use a minimum of 42% CPU.

I'm writing this on a machine with no files left to sync. No files are being synced at this time. Core Sync is running, and Windows Explorer is hitting 43.8% CPU usage.

Killing Core Sync returns usage to normal.

This is not a machine specific issue but occurs on multiple Win 10 1809 devices.

It appears Adobe has a bug to squish.

For reference, this user is having the same trouble: https://www.reddit.com/r/Adobe/comments/9o7a4c/core_sync_causes_windows_10_explorer_more_to_have/

Any thoughts, Adobe?

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    NickFinchCorrect answer
    Participant
    Jun 28, 2019 8:56 AM UTC

    It would be nice if Adobe actually fixed this, but in the meantime you can limit the amount of CPU the process uses to prevent your machine hanging for 10 minutes at a time. You need to do the following;

    1. Open task manager (windows key + T or just search task manager from the start menu)
    2. If it opens in the reduced view, click on more details;
    3. Click on the Details tab
    4. Find CoreSync.exe in the list
    5. Right click and select Set priority --> Low
    6. Right click again, and select set affinity
    7. Uncheck <All Processors>
    8. Check just one processor

    Hope this helps. It at least stopped the process from hanging my machine almost every morning.

    View reply

    10 replies

    champdaction
    Participant
    Apr 29, 2020 3:41 PM UTC

    SOLVED!
    THis instance of CoreSync.exe with the adobe loge turned out to ba VIRUS.
    It's a Bitcoin miner.  After getting rid of it no more issues. 
    Nothing to do with Adobe.
    Just google coresync.exe virus et viola...
    CoreSync. If the location of CoreSync.exe is in a subfolder of the Windows folder for temporary files, then this mean that your system has been compromised to a Trojan Horse virus. The CoreSync Virus is a Cryptocurrency Miner. The Trojan Horse viruses are pretty common online infections.7 nov. 2019

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    MartinL_Alza
    MartinL_Alza
    Participating Frequently
    Jul 12, 2020 3:25 PM UTC

    Not true unfortunatelly.

    I have the same problem. On multiple devices (Win 10). CoreSync.exe is located in "C:\Program Files (x86)\Adobe\Adobe Sync\CoreSync". It is not miner Trojan. It is a genuine process of Adobe Creative Cloud bundle. 😞

    I think it's caused by the loop in the syncing process. Because mine sync is forever stuck in 1748 files from 4714 and never moves up. Don't know how to solve it. 😞

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      NickFinchCorrect answer
      Participant
      Jun 28, 2019 8:56 AM UTC

      It would be nice if Adobe actually fixed this, but in the meantime you can limit the amount of CPU the process uses to prevent your machine hanging for 10 minutes at a time. You need to do the following;

      1. Open task manager (windows key + T or just search task manager from the start menu)
      2. If it opens in the reduced view, click on more details;
      3. Click on the Details tab
      4. Find CoreSync.exe in the list
      5. Right click and select Set priority --> Low
      6. Right click again, and select set affinity
      7. Uncheck <All Processors>
      8. Check just one processor

      Hope this helps. It at least stopped the process from hanging my machine almost every morning.

      Translate
        kevinm56655703
        kevinm56655703
        Participant
        Jun 28, 2019 3:01 PM UTC

        Just made this change, as it sounds VERY promising. I'll try it out for the next week and report back.

        THANKS NICK!

        --Kevin

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          Abambo
          Community Expert
          AbamboCommunity Expert
          Community Expert
          Apr 9, 2019 9:43 PM UTC

          Feature Request/Bug Report Form  — to report suspected bugs.

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          ABAMBO | Hard- and Software Engineer | Photographer
          kindanewtothis4738432Author
          Known Participant
          Apr 10, 2019 2:35 PM UTC

          Already done. Posting HERE, however, confirms my suspicions that I'm not the only one with this issue.

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            kevinm56655703
            kevinm56655703
            Participant
            Jun 11, 2019 3:34 PM UTC

            I have the same issue on both machines authorized for CC, and it renders my computer useless for about 20 ~ 30 minutes as the  CPU is pegged at 100%. Very frustrating, and completely negates the advantage in boot-speed I was seeking when I installed M.2 drives as the boot drives.

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            Strikie
            Participant
            Apr 7, 2019 6:28 PM UTC

            You're not the only one, I have the same problem both on my desktop and laptop. And I even reset windows to its original state, to no avail (and a loss of a lot of time).

            Very disappointed because it is the only cloud service I encountered with this problem, it simply makes the service unusable at times.

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