Hi,
To remove Dell Updates from SCCM follow these steps to expire/remove them.
1. In SCCM under the Console Tree expand the Site Database > Site Management > %Site Name% > Site Settings > Compo-
nent Configuration group and select the properties of the Software Update Point Component.
2. The Software Update Point Component Properties screen will appear, switch to the Sync Schedule tab and check Enable synchronization on a schedule, press OK. This is required for SCCM to remove the expired updates per the schedule time.
3. In SCCM navigate to Site Database > Computer Management > Software Updates > Update Repository > Updates > Dell > All Updates select the update you wish to remove and click Action > Properties. From the properties screen choose Expire.
4. Expiring updates will not instantly remove them, a clean up scan will run 14 days after marking the updates expired and remove them from SCCM. Updates can not be removed from SCCM if the updates are included in a deployment package, first delete the deployment package then expire the updates.
5. Updates may reappear in SCCM if they are not unchecked in the next SCUP publishing / synchronization.