How do I exclude all files that end with MDB (*.MDB) ?

[Guest]

In MS Defender (Beta 2) How do I exclude all files that end with MDB (*.MDB)
from being scanned?

I manage a couple offices that have two apps that run at the same time on
all workstations. There is heavy *.MDB file opening and closing. Users have
complained that the system has gotten very slow ever since I installed the
new Anti-Virus and MS Defender apps. I've excluded the *.MDB files in the
Anti-Virus software and it has helped a lot. They said it is still slow.
Now I want to exclude the *.MDB files in Defender. I assume it will improve
the performance also.

In Defender, when I select a file to exclude using the exclude folders/files
option at the bottom of General Settings, it doesn't allow me to use a file
mask. You can only exclude an entire folder or the file you select. If you
edit the file name it reverts back to the selected file name.

I can't pick the files I want excluded because the application generates the
file names on the fly. I can’t exclude entire folders because it generates
folders names automatically also.

* MS Defender Support: Please add file mask and subdirectory support to the
Defender exclude feature.

Thanks.

 

[Guest]

Hey Indy,

Defender shouldn't be scanning these files while the user is actively using
the system. It should only do so when a scan is happening, which is
typically scheduled after you're on the computer...

Could you try to identify whether Defender is indeed scanning the MDB file?
A useful tool to do this is FileMon, from http://sysinternals.com/. Set the
filter to *.mdb files and see who opens them. That should tell you two
things: who is opening the files and whether to blame Defender.

Hope this helps,