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

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 :|

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

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.