Hi. So sorry. I thought I had posted a response earlier - but I don't see it???
Anyway, Re: the printer... I don't have the registry keys/model in this article: http://www.pchell.com/support/msconfig_access_denied_error.shtml
, which is something I found before coming here.
Re: the image... I just thought it was strange to have several msconfig.exe files and wondered if something was modified by an infection??
Re: using msconfig... I used Run > msconfig > Startup tab > and unticked Sandiebox to stop it from loading at start up. (I'm really sorry if that's wrong, but that's how I've done it before.) This time when I clicked apply, I got the error. I clicked OK (in the error message), then OK on the config window, and then I got the usual restart/exit without restart option. It lets me untick and stays that way after reboot but I don't understand the error.
I've run Eset online and there's nothing showing up.
The only other thing I can say is that I recently installed Oracle VirtualBox so that I can run Joomla on my PC. Maybe it's something to do with that???