I have installed a recent community version of MySQL from MySQL site. The version is 5.6.x
.
It was done using an installer and I also chose the option t
Since the other answers require OS interaction I figured it would be beneficial to provide the "MySQL" way.
I am surprised to see and wonder what is it doing and connecting to a remote server and doing what?
It's keeping the MySQL Product Catalog up to date. As described in the documentation,
This option uses the Windows Task Scheduler to schedule a task named "ManifestUpdate". (this is the scheduled task that is disabled the OS way)
Does someone know the internals and how to prevent it from connecting to a remote server?
To prevent it from connecting you can disable it without going through the OS:
You're ready to go...
This could be a security issue?
I'm not a security expert but it's connecting to the same people you trusted to get the software from so I think it's more of a nuisance than a risk.
Luckily, you can manually update it as needed by clicking the Catalog...
button seen above and force it.