Running the update from elevated command prompt. Just finished two sets of windows updates and rebooted both times. Checked for updates and no more available. Run setup with accept policy command and receive this error just after the prerequisite check. I've read that you just have to let the service finish but I've retried a few times with no luck.

Setup can't continue with the upgrade because the SFService (10544) has ope
n files. Close the process, and then restart Setup.

Hi Jon,

please try the following Exchange PowerShell command:

Set-ServerComponentState -Identity yourserver -Component PopProxy -Requester HealthAPI -State Active

Sounds like Your imap Proxy is bad.

Thanks for your reply. Turns out it was our Spamfilter software, once we disabled the three services the install went thru.

• Marked as answer by Andy DavidMVP, Moderator 20 hours 54 minutes ago