I have a laptop that encounters the error 0x800710fe (This file is currently not available for use on this computer.) for several offline-available files, eg if I try to delete it. Furthermore, the synchronisation centre shows an error (permission denied) for the root folder of the netowrk share that is partially made offline.

As I understand, this is caused by some kind of corruption of the local offline cache and the typical recommendation is to rebuild this cache. The machine in question is not my own and the user is unsure how many files he changed since the error first occurred.

Therefore, my first question is: Does the error on the root folder mean that no files are synchronised any more, ie if I rebuild the cache, can I lose files that are not corrupted, but have not been synchronised to the server? I did a quick test and it seems that new files are synchronised correctly, but I could not find any indication that this is the expected/guaranteed behaviour?

Second, can I remove the problematic file from the cache manually without rebuilding everything?

Third, does the synchronisation error for the root folder relate to the file(s) that are corrupted? Can I get more detailed Information about this error?

And fourth, what are the typical reasons for such corruptions? It seems that the laptop in question exhibits this behaviour quite frequently, and I obviously want to stop it from doing so.

Thanks in advance,
Christoph

Hi Christoph,

It seems that the offiline cache has corrupted.
Usually we can take the following steps to clear the cache.
1.Control Panel\All Control Panel Items\Sync Center. Click Manage Offline Files. Select the Disk Usage tab and then click the button Delete temporary files.  
2.If the issue persists, restart and log in Safe Mode. Then, open regedit, manually locate to:
HKLM\System\CurrentControlSet\Services\CSC\Parameters
Then, add a REG_DWORD key, name FormatDatabase and change its value to 1.
Then reboot.

For you question:
"Does the error on the root folder mean that no files are synchronised any more, ie if I rebuild the cache, can I lose files that are not corrupted, but have not been synchronised to the server?"
We can try to check the Sync center for the "Sync results".

" can I remove the problematic file from the cache manually without rebuilding everything?"
The offiline files is located in  %SystemRoot%\CSC.The CSC folder is hidden by default and should not be modified in any way.It may result in unexpected behavior.Once the cache database has been reset.We will got a local copy from the server again.

"does the synchronisation error for the root folder relate to the file(s) that are corrupted? Can I get more detailed Information about this error?"
"0x800710fe"means "The remote storage service was not able to recall the file".
"what are the typical reasons for such corruptions? It seems that the laptop in question exhibits this behaviour quite frequently, and I obviously want to stop it from doing so."
It is hard to make a summary.We can try to allocate the related information from the Event Viewer to analyze the issue.We can run "sfc /scannow"to check the health of the system files.
Event Viewer\Windows Logs\Applications,System
Event Viewer\Applications and Services\Microsoft\Windows\OfflineFiles

All in all,the best solution is to reset the offiline cache database.
Best regards

Thanks for the answer.

"Does the error on the root folder mean that no files are synchronised any more, ie if I rebuild the cache, can I lose files that are not corrupted, but have not been synchronised to the server?"
We can try to check the Sync center for the "Sync results".

I have already checked the sync results, and it lists some files, but this does not include the file that cannot be deleted, so I do not really trust this list if it does not show the obvious problems. Nevertheless, in theory, files not listed there should have been synchronised, correct?

" can I remove the problematic file from the cache manually without rebuilding everything?"
The offiline files is located in  %SystemRoot%\CSC.The CSC folder is hidden by default and should not be modified in any way.It may result in unexpected behavior.Once the cache database has been reset.We will got a local copy from the server again.

I understand that so far, but as I understand, erasing the cache would erase files that have never been written to the server. Is there any possibility to see whether such files exist, because I do not know atm and I do not want to lose such files.

"does the synchronisation error for the root folder relate to the file(s) that are corrupted? Can I get more detailed Information about this error?"
"0x800710fe"means "The remote storage service was not able to recall the file".
"what are the typical reasons for such corruptions? It seems that the laptop in question exhibits this behaviour quite frequently, and I obviously want to stop it from doing so."
It is hard to make a summary.We can try to allocate the related information from the Event Viewer to analyze the issue.We can run "sfc /scannow"to check the health of the system files.
Event Viewer\Windows Logs\Applications,System
Event Viewer\Applications and Services\Microsoft\Windows\OfflineFiles

All in all,the best solution is to reset the offiline cache database.

I have not yet tried sfc, but chkdsk, which did not find any problems. I will look into the logs you specifically mentioned next ...

Thanks again,
Christoph

Hi Christoph,

"Nevertheless, in theory, files not listed there should have been synchronised, correct? "
All the results of your sync activity should be recorded here.
Here is a link for reference:
Understanding sync errors and warnings(It should be applied to Windows 8.1)
http://windows.microsoft.com/en-hk/windows-vista/understanding-sync-errors-and-warnings

" Is there any possibility to see whether such files exist, because I do not know atm and I do not want to lose such files."
I have tried to navigate to the folder from my test machine and the files here are not readable.So I am afraid we will lose them.It is not recommended to make modifications to this folder.

Best regards