I have both Acrobat and Reader (both v 9.2.0), and whenever I open a second PDF, my PC completely bombs out and restarts.
I has to be a setting in that is individual to my PC or my Acrobat/Reader because another user within the company can open multiple files without problems.
I've read elsewhere that turning off the "Use 2D graphic acceleration" option fixes an issue where opening multiple files crashes Acrobat, but this has not helped me.
Thanks for the suggestion Kevin, but I think checking sysprocesses is a little above my pay grade!
I did however check to see the mem usage for both apps in Task Manager, and Acrobat was steady at approx. 43000k when it had an open file, but I wouldn't know whether this is large or not???
Then the problem seemed to disappear because I miraculously opened numerous PDFs with no problems. This worries me a little though!
Adobe doesn't recommend or support having Reader and Acrobat on the same computer. Uninstall one and re-install the other.