In WSUS (3.2.7600.226), I've specified which updates we wish to download onto the WSUS server from Microsoft.
We don't use Microsoft Exchange, so it is not selected in Options > Products & Classifications.
However, this week I noticed more than 1000 new (unapproved) updates appear in All Updates, including updates specific to Microsoft Exchange, Lync, Windows Vista, etc. all of which are not selected as updates we want to download (in Options > Products & Classifications).
I've run Options > Server Cleanup Wizard, yet these updates remain, waiting to be approved.
The WSUS data directory has also increased in size by about 15 GB recently also.
Why has this happened? How do I resolve it, and prevent it from happening again?