Strange problem with *stock* CFS1

Started having this problem with a *stock* CFS1, that has been uninstalled, deleted, checked temp files and registry, rebooted, made sure I emptied recycle bin, etc.
Reinstalled. Still having this problem.
When I try to run a campaign mission, and sometimes other missions where I take off with other members of a formation, but it's really bad in the BoB campaign:
I'll just be getting into the mission, and the other plane(s) on the runway will flip over forward onto their backs and blow up, taking me with them. If they don't do that, they'll shift left a little, and end up hitting a building on the takeoff run. 1 in 10 times, I actually can get off the ground with the formation I'm supposed to have.
Any ideas? As outlined earlier, this is *stock* from CD CFS1. I have deleted all traces that I know of any previous installations.
Thanks!
Reinstalled. Still having this problem.
When I try to run a campaign mission, and sometimes other missions where I take off with other members of a formation, but it's really bad in the BoB campaign:
I'll just be getting into the mission, and the other plane(s) on the runway will flip over forward onto their backs and blow up, taking me with them. If they don't do that, they'll shift left a little, and end up hitting a building on the takeoff run. 1 in 10 times, I actually can get off the ground with the formation I'm supposed to have.
Any ideas? As outlined earlier, this is *stock* from CD CFS1. I have deleted all traces that I know of any previous installations.
Thanks!