An update lock is already held; cannot start another update now

Question

I received an alert today for a device that has missed two updates. Looking at the susvc.log file on the machine I see lots of " An update lock is already held; cannot start another update now ". 
 A restart of the AutoUpdate service didnt fix the issue, is there something extra I would have needed to do to resolve the problem please? A reboot did sort the issue, however, if there is a quick fix for next time that avoids the necessity of a reboot then great. 
 Regards Andy

Shweta · Answer

Hi AndyR 
 You can also schedule the updates for the machines as mentioned here under the updating policy. In Central, the administrator can control product updates. Please check this link for information. 
 Note : You can only control updates for Windows computers and servers. 
 "Restart needed for updates to take effect" will be appeared for the servers or the endpoints whenever there is a product version update. You should reboot the servers as soon as possible to complete the update.