Just try the new alpha version of TeXnicCenter. It has been released today. You can get it from its homepage. I had the opportunity for a short test and had no problems (on XP). I will continue testing tomorrow and report here by supplementing my short review.
I have tested TXC 1 and the new 2 Alpha 1 on Windows Vista without any problems. Only the installation requires administration rights -- afterwards everything works smoothly even for a user without admin rights.
As the step from Vista to Windows 7 is not a big one (in contrast to the one from XP to Vista), I do not see any problems regarding Windows 7 support. If there will occur any problems, I am sure, that the developers will fix them.
Regards
Sven
LaTeX Community Administrator
Originator of TeXnicCenter