MSOCache Folder Information

Martin Brinkmann
May 8, 2010
Updated • Sep 14, 2015
Microsoft Office, Windows

You might have noticed a MSOCache folder in the root directory if you have selected the option to view hidden folders in Windows Explorer. Microsoft Office creates the folder during installation to cache files that are needed to install Microsoft Office.

The folder is not needed to run Microsoft Office and can therefore be deleted safely. It has to be noted however that Microsoft Office will first use the files from that folder if the user activates the repair option. A deleted folder means that future repairs and installations need the Office installation CD or DVD.

Here is how you check if the MSOCache folder exists on your computer system.

Start by opening Windows Explorer. Select Tools from the top menu and then Folder Options. This opens a new window. Switch to the View tab and locate the Hidden files and folders section.

Switch from "Don't show hidden files folders or drives" to "Show hidden files, folders and drives". This is enough to see if the MSOCache folder exists on the computer system.

Update: Select View > Hidden Items in newer versions of Windows which display a ribbon at the top so that you don't need to dive into the folder options anymore for that.

Open the c: drive in Windows Explorer and see if the MSOCache folder is there.


A right-click on the folder and the selection of properties reveals the size of the folder on the disk. This can be anywhere from 430 Megabytes if Office 2007 is installed to more than 750 Megabytes for Office 2010.

Select the folder and hit the delete key if you want to delete it. Deleting the MSOCache will require the Office CD for the following operations:

Detect and Repair
Demand Install
Maintenance Mode Setup
Installation of service packs and patches

Make sure you have the installation CD or DVD before you delete the folder. An alternative to deleting the folder outright is to back it up before deleting it. This way you can restore it if the need arises.

MSOCache Folder Information
Article Name
MSOCache Folder Information
If you have installed Office on your system you may want to check for the hidden folder MSOCache which may occupy a sizable amount of space.

Tutorials & Tips

Previous Post: «
Next Post: «


  1. oto said on January 21, 2019 at 8:34 am

    You will not have office icons if that folder is deleted

  2. FADY said on September 2, 2014 at 6:32 pm

    hello I remove the folder by clicking on right click and delete and It’s was deleted
    and now I cannot open any application

    and I do not have the Install CD!!


  3. operayea said on May 9, 2010 at 3:15 am

    the article should state what the impact is in the future if the folder is no longer there… .

  4. bf said on May 9, 2010 at 1:10 am

    So every time you will want to update your Office to SP2/SP3 or any other critical update in the future, you will need to download and reinstall SP1 and all previous critical updates all over again. I think it is worth to keep 770Mb of backup if Office is important to you. I leaned it hard way with Office XP and its constant repairs.

  5. Jojo said on May 8, 2010 at 8:44 pm

    I would not remove this folder. It is used as more than just for repairs. For instance, you would have to go hunt the CD and insert it for install of any patches or service packs, and access would be much slower than if the files were on the hard disk.

    See KB article:
    The Local Install Source feature is installed so that you do not have to insert the CD during the following Setup operations:

    * Detect and Repair
    * Demand Install
    * Maintenance Mode Setup
    * Installation of service packs and patches

    1. Martin said on May 9, 2010 at 9:43 am

      Thanks Jojo, I edited the main article to reflect this better.

  6. Ahmad Saleem said on May 8, 2010 at 7:26 pm

    Thanks a lot, I always consider it as a part of Office and never deleted it, Now I can do it, bundle of thanks.

Leave a Reply

Check the box to consent to your data being stored in line with the guidelines set out in our privacy policy

We love comments and welcome thoughtful and civilized discussion. Rudeness and personal attacks will not be tolerated. Please stay on-topic.
Please note that your comment may not appear immediately after you post it.