Delete Offline Files Cache Windows 7

Thursday, September 9, 2010 Leave a Comment

In Windows 7 there is no user interface to delete Ofline Files cache (CSC cache).  The only way to delete cache is using registry key. Detail steps are given below.

  • Open Registry editor (Execute Regedit from Run window)
  • Traverse to the path path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Csc\Parameters 
  • If Parameters key does not exist under CSC you can create a new node with that name.
  • Now in the Parameters node create a new registry value with the name FormatDatabase of type REG_DWORD (i.e DWord 32-bit value)
  • Set the data in this new registry value to 1.
  • Close registry editor.
  • Reboot the machine
The above steps can only be done from an administrator's account. We can do the above steps from command line too. For this you just need to run the below command from elevated administrator command prompt.

reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Csc\Parameters /v FormatDatabase /t REG_DWORD /d 1 /f


If you run the above command from a normal administrator command prompt you will get "Error: Access is denied" message.


Note that the 'Delete temporary files' button under the 'Disk Usage' tab in  'Manage Offline files' window is not meant for deleting offline files cache. Some people have the misconception that this deletes offline files cache. This is not true.

17 comments »

  • Anonymous said:  

    Worked, thanks for posting!

  • Anonymous said:  

    this worked perfect. any idea how these files get corrupt on a single domain machine?

  • Anonymous said:  

    Worked Brilliantly thanks!

  • Anonymous said:  

    should i still be seeing folders in c:\windows\csc\v2.0.6\namespace\server\share\ after i do this on a client?

  • Anonymous said:  

    This worked great! I have had this issues for weeks - nobody could resolve!

  • Anonymous said:  

    How can you recover lost files after you do click 'delete offline copies' and then run this in the registry?

  • Anonymous said:  

    Didnt work for me - where isthe actual folder located? - you can actually manually delete it but I cant find it...

  • Techblogger said:  

    Actual folder can be found @ C:\Windows\CSC

  • Richard Andrews said:  

    I just deleted the v2.0.6 folder within CSC to solve my problem. after a reboot the folder is recreated and offline file will be saved again.

  • Anonymous said:  

    FYI people the CSC cache is a database not a set of folders containing the files. This database becomes corrupt due to a large number of reasons, but usually based on having too many files and the database being closed mid-sync. I.e. computer crash or sudden restart. Though i've had to reset the cache to just get offline sync working the first time.

    As for the person looking to recover files after resetting the cache. Good luck, you are trying to recover something you've purposfully deleted. Always try and recover the files before doing something destructive. If you are lucky perhaps the files are still on the server or may be available as part of the servers "Previous Files" volume shadow copy.

  • Anonymous said:  

    After doing your steps I still found my offline cache here in c:\windows\csc\v2.0.6\namespace\

    I removed them by hand.

    In spite of your method work fine! Thanks

  • galacticpresident said:  

    does that registry entry need to be removed after a reboot or I just leave it there?

  • Denis Chang said:  

    this perfectly fixed my issue after I've struggled and tried all other method including clearing CSC\namespace.....

    thank you so much!

  • Anonymous said:  

    Thanks so much. it worked.

  • Anonymous said:  

    That has been very helpful. It worked perfectly for me. Thank you very much.

  • Brad said:  

    Does that regestry need to be removed after reboot? I am also wondering this...

    What exactly does it do? Will it clear the cache everytime I reboot?

  • Brad said:  

    Ah, sure enough it deletes itself automatically. Found a note about it on here: http://support.microsoft.com/kb/942974

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