Ican not download Microsoft upgrades It says check security domain

Are you referring to Trend Micro upgrade installation or Microsoft Upgrade/Update?

For the upgraded version of Trend Micro Antivirus+ you may get the installer for this link Esupport

If you are referring to Microsoft update we highly suggest that you give them a call to have the issue rectified.

Microsoft: 1 800 642 7676 / 425 635 3311


Cheers!

Thanks