Hi,

Using DC latest edition.

One of the PC's running Windows 8.1 Pro.

After system patch scan, I get 33 patch's missing, although they were already installed.

Then I get " Unknown Error. Code : -21...", when I try to create a patch configuration install.

I even delete the computer and ununstall the agent and install back, but same thing.

I thing that a month ago, I had to reset the windows update in this PC, not sure.

anyway, I didn't find any way to solve this issue.

-Roei