In context, mscorsvw.exe should not be accessing the internet at all (or attempting to). Run a malware scan, because it is possible that bad stuff is...
I don't think there's any way to extend or shrink the aforementioned time. I get annoyed when I click "Close", then the application responds and then...
To get to the BIOS, restart your computer. When you see a screen that shows the logo of your computer's manufacturer (usually stays on screen for 1-3...