I've used TXC for years on WinXP no problem. Now I have installed version 1.0 Stable RC1 onto a Toshiba NB 305 with Intel Atom CPU N450 running Windows 7 Enterprise 32-bit (6.1, Build 7600). I also installed MikTex 2.8.
TXC hangs/crshes ("TeXniCenter has stopped working") when I
* double-click a .tex file, or
* file.open then try to open a .tex file, or
* file.new from template, English, Titlepage
The program is completely useless now.
I also have TeXworks (v 0.3) installed on my system, but I woudn't think that it would affect TXC.