Hi.
I am in highschool on my 10th year and we use mathcad as a standard program in math class, and without it, I am doomed.
Problem: Every time I start up mathcad, it crashes instantly.
It worked two weeks ago and since then I've tried reinstalling it, then running it, it crashes, reinstall it, repeat the evil cycle.
Try to contact with PTC's tech support by using "Mathcad Support Center":
http://www.ptc.com/support/mathcad_supportCenter.htm
http://blogs.ptc.com/2011/09/22/how-to-use-the-brand-new-online-mathcad-support-center/