Welcome!
It sounds like a certain process is causing the hang.
Before you shutdown next time, end half the processes in
Task Manager>Processes tab. Be sure to write down which ones!
If the hang stops, we can work on narrowing down which process is the issue.
Alternatively, you could try a
System Restore to get back before the hangs.
Good luck!
~JK
Edit: I saw your second post. You may seem some performance increase if the page file is on a separate physical drive. However, if your main OS drive is 7200 RPM, and your secondary drive is only 5200 RPM, the performance may not increase at all.