Due to the "Meltdown and Spectre" Windows Update, Pyramix 11.0.6 / Ovation 7.0.6 is mandatory for MassCore users.
If for any reason you can't update to that version, do not install updates KB4056894, KB4056897 and any other following Important update (as Windows update are cumulative)
If you use the Windows Defender antivirus, Merging recommends you still update it on a regular basis, for security purpose.
Windows Update configuration
Go in Windows Control Panel > Windows Update and click on Change settings on the left pane.
Select Check for updates but let me choose whether to download and install them.
Hide an update
If you don't want Windows to propose you some specific updates, you can hide those updates.
Go in Windows Control Panel > Windows Update and click on the x update(s) available list.
In the available updates list, right click on the update you don't want to get and select Hide Update.
Uninstall an update
Go in Windows Control Panel > Programs & Features then click on View Installed updates on the left pane.
Locate and select the update you want to remove in the list.
Then right click and select Uninstall
Windows will uninstall the update, and you will need to reboot for the uninstall process to finish.