C:\MSOCache\All Users

can i delete C:\MSOCache\All Users
and i wanna know the names of folders that contain big size which i can remove

The MSO in MSOCache stands for MicroSoft Office.

It is a copy of the Microsoft Office's installation CD. It is there so that you don't have to insert the CD again if you have to perform repairs or add new features.


You can delete the folder, but, that same Microsoft Knowledge base article states:

Never delete the MSOCACHE folder by using Microsoft Windows Explorer.

After you remove the Msocache folder, you may have to provide the installation media to complete the Setup operations that are listed earlier.


They suggest using the They suggest using the Windows Disk Cleanup Wizard. I don't know why too, but you can access the Windows Disk Cleanup Wizard by following these steps:

1. Click Start, point to All Programs, point to Accessories, point to System Tools, and then click Disk Cleanup.

2. In the Select Drive dialog box, in the Drives list, click C:, and then click OK.
Note: If you have more than one hard disk, the Office setup files will be on the partition that had the most free space during Office Setup.

3. Wait for Disk Cleanup to finish checking the drive.

4. In the Files to Delete list, click to select the Office Setup Files check box, and then click OK.
Note: If the size of the Office Setup Files is zero, the Office Setup files are on another hard disk.

5. When you receive the following message, click Yes:
Are you sure you want to delete these files?