I can't imagine that no one has asked about this before, but nothing came up when I searched for "MSOCache"... I just had to upgrade part of Office to the 2007 version for work, and I noticed a new 529Mb folder afterward.with install data backup for Office Apparently "MSOCache" used to be removable on the 2003 version, but according to a web search, the Office 2007 version can not be removed. After 3 years, has anyone found a way to remove this useless folder? I am particularly irritated because I only installed Powerpoint 2007 and yet the install program copied the install files for ALL of Office 2007 to my HD. I already have the install file backed up, and I do not want MS storing its crap on my HD at over 500Mbs. Anyone have any ideas besides the things that used to work for Office 2003 (clicking the option to remove install files during install, using Disk Cleanup to find and delete the files) but that no longer work for Office 2007? If you delete the folder manually it just reappears, and so good luck if malware sneaks itself in there - you would never be able to clean without an OS wipe. Thanks!