robh

Here is a post from another site that sums up the issue around deleting this file on a DC. The source of that post is located here, just so you can see the post in context. Sadly, I will say that a year or so ago I learned this lesson the hard way when I followed instructions from someone that sounded very competent and deleted the file from a DC.

If you delete the $UsnJrnl:$J on a domain controller, you will create a big problem. Before recommending anyone deletes a system file, you should be very sure of what you are saying. As far as I can find, there is no 100% safe way to deal with a fragmented UsnJrnl. In some cases you "may" be able to delete it with no significant side effects. In others it may be catastrophic.