Two issues fixed by the same Hotfix:

• High CPU utilisation after installing the CM12R2 client
• Applications not appearing in Software Center despite meeting all requirements and not already being detected.

Fix: http://support.microsoft.com/kb/2617858

More on this.

WMI.

https://social.technet.microsoft.com/Forums/en-US/187c682a-f686-4885-aea0-436200e61eef/sccm-2012-agent-and-high-cpu-utilization?forum=configmanagergeneral

- Collection called Catalog1 uses a Query for OU memberships and returns all matching devices

- App-model applications are deployed as Available with requisite Detection methods to device Collections for that App i.e. App1 to Coll1, App2 to Coll2 etc.
- An Include query on each Collx of Catalog1 (meaning those devices also appear in Collx)
- Catalog1 is set to Incremental Update and Collx are set to update every hour (we are in test currently)

So what happens is a machine with the client does not always show the 20-something applications in SC despite being in each collx. More stangely, sometimes only a couple of applications are listed despite meeting the apparent requirements (and not already being detected).