CSISYNCCLIENT.EXE consuming CPU on Win 8.1 (Microsoft Office Document Cache Sync Client Interface)

Anonymous
2013-12-17T18:02:43+00:00

Hi,

I constantly show a very high CPU usage on the CSISYNCCLIENT.EXE process (MS Office Document Cache Sync Client Interface). This is very frustrating and slowing down things on my laptop.

Does anyone know how to fix this?

Pls help.

VB

Microsoft 365 and Office | OneDrive | For home | Windows

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Anonymous
2014-04-29T09:17:22+00:00

I managed to narrow it down to OneDrive that was causing the issue. After reading Millewa's post I hunted down a way to delete the cache, and so far so good.  Fingers crossed as this has been dragging out over a few days now.

I followed these steps to delete the cache (yes - I know its for SkyDrive but it still worked)

To clear your cache, close all your Office processes like groove.exe (which is SkyDrive Pro), msouc.exe, msosync.exe, office library sync,

Browse to “C:\Users%username%\AppData\Local\Microsoft\Office\Spw” and delete all the content. (You will see that this is all related to groove and spw = SharePoint Workspace).

Next, go to “C:\Users%username%\AppData\Local\Microsoft\Office\15.0\OfficeFileCache” and also delete all content from this folder. This is where all the caching from your files are stored.

After you deleted everything, you should be able to start SkyDrive Pro again (using “C:\Program Files\Microsoft Office\Office15\GROOVE.EXE“).

Good luck! I will re post if it starts playing up again :|

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Anonymous
2014-05-02T07:51:53+00:00

Hi all,

I just suffer the same issue with my original surface pro 128G (win8.1)

I check the task manager which show a lots of CSISYN~1.exe execute in background and CPU usage is 100%.

I try to dig out some solution by google and short summary as below.

1.Unchecked****the option "Use Office to sync files faster and work on files" in onedrive( sky drive)

But it didn't work for me due to I even cannot find the setting option in my onedrive setting.

2. Removal/reinstall the office 2013 or office 365.

It work but when I re-install the office, the issue come back again.

3. Removal the skydirive or onedirve app/ program

As you known, the ondrive is default app in win8.1. however, I still find a skydirve program in programs and features of control panel.

Therefore, I try to uninstall and remove it. -----> it work. no more CSISYN~1.exe abnormal execute in background and everything normal.

For you all reference.

Thanks

Arthur

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Anonymous
2014-04-29T07:12:01+00:00

Dear All,

I actually worked with a second-level Microsoft technician today (for about four hours, via phone and LogMeIn), and the problem was actually solved. The cache used by OneDrive (MSO cache) was corrupted. The installation of Office 365 was completely removed, and a clean install then worked. I was not following all the details as the technician worked on the computer via LogMeIn, but I can say that in my particular case, the Csisyncclient.exe problem resulted from a corrupted cache.

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  1. Anonymous
    2015-04-01T13:43:32+00:00

    Bob\_Walker replied on

    This is exactly what I see when I open the resource monitor. The only workaround I have found thus far is to search for the file CSISYNCCLIENT.exe and then rename it e.g., CSISYNCCLIENT_Disabled.exe. Then system resources fall back to near zero. I assume it has something to do with Sky/OneDrive, but it is impossible to decipher.

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  2. Anonymous
    2015-05-26T22:47:55+00:00

    In my case, the problem has gone away after I selected "Pause syncing" after right-clicking on the OneDrive icon in the notification area. Slowly, one by one, the dozens of CSISYNCCLIENT.EXE processes go away. After selecting "Resume syncing" the same away, the buildup of these processes starts once again until they're killing the disk and CPU.

    I haven't tried clearing the Office cache, since my OneDrive is mostly just GBs of photos unrelated to Office. I have OneDrive for Business active separately on the same system, but this doesn't seem to spawn any CSISYNCCLIENT.EXE processes, or at least none with much disk/CPU activity. The problem appears unrelated to Office or OneDrive for Business on my system, which is surprising, given other people's conclusions and fixes on this thread.

    ETA: I finally decided to clear the Office cache, as described earlier in this thread, but this had no effect.

    In addition, I resumed OneDrive syncing and ran procmon to check activity due to CSISYNCCLIENT.EXE. It's just crazy: These processes perform tens of thousands of file and registry accesses every second, comprising the bulk of overall system activity. The particular files and keys being accessed look largely obscure (nothing to do with my OneDrive files) and unhelpful in terms of tracking down a specific problem.

    Click on "Pause syncing," and all the above magically comes to a grinding halt in seconds; click on "Resume syncing," and it all starts up again like a hotrod going from 0 to 60 in 2 seconds. Needless to say, I have "Pause syncing" on permanently unless I'm adding files to my OneDrive.

    I have no idea what's going on, but whatever is happening during this so-called "syncing" is just nuts.

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