Hi leroo,
Agent should perform installation on next scheduled day/time
By default on next day @03:00 and will try to install previously failed installations.
You can increase reinstallation attemtps in "Default Software Update Plug-in Policy"
Or you can temporary clone "Default Software Update Plug-in Policy" policy via mouse right click menu -> "Clone"
- set there earlier time to perform patch installation and
- assign it only on required client computers where previous patch installation was failed.
Note: Don't forget to delete this cloned "Default Software Update Plug-in Policy" policy to avoid further unnecessary attempts of patch installation on assigned client computers!