I'm running Windows 7 Ultimate, 32-bit.

For the last couple of days, MSE doesn't fails to update, remaining stuck at version 1.75.119

I presume that an error log is created somewhere, or an event log, but I don't know where to find those.

It just says "connection failed". Tried it at home, at work and friends places, but never works. Restarted computer a lot of times now, checked for Microsoft Updates in general, but nothing shows up.

EDIT: I've opened a bounty for this, because I really don't know what to do anymore.

The oldest answer(the long post) here did not work.

Besides this problem, I'm having trouble using MSI installers too. I've had to add the SYSTEM group to a lot of maps and give them full control, but shouldn't the SYSTEM already be there?

Also, I had to remove the "read-only" attribute from the ProgramData and Users folders, add the SYSTEM group there too and give them full control. Only then will the MSI install work and even then, it says I doesn't have the rights to create a shortcut on the desktop. Don't know what I need to modify and where for that.

I'm saying this because I don't know how MSE updates, but if they use MSI files to do that, that might explain things.

The SYSTEM group remains added, but every time I take away the read only attribute, click OK and check the settings again, read-only is still active...

That's all I know.

Screenshot, all those updates were manual: