DFox, it shouldn't do that.
C2 Crashes - I've had my fair share of them. Crash issues with C2: Check your drivers (graphics etc are up to date) C2 is real sensitive to this. Also, in my own plight with crashes, mine in some degree boiled down to corrupted registry files. I wrote a script to fix it, but this does the same thing plus more Tweaking.com - Windows Repair (All in One) does a pretty decent job. I've used the software before.
But it might be best to put all the details you can about your system, and exactly what you are doing / have done (Go into loads of detail) and get Ashley attention to view what might be the issue.
Construct2 and steam DON'T play well - so your frustration isn't in isolation :)