Sorry I can't help Al.
I have never used System Mechanic. I do have Registry Mechanic. Is this from the same company? I will have to go look.
Anyway, from your posts I take it that IL-2 was working fine prior to installing this program but now it doesn't (but everything else does), right? Furthermore, it is a program that is kept in memory on each boot, right? Finally, even when disabling the program the problem with IL-2 continues, right?
Well, if you intend to use it again after a reformat I would suggest you figure out the problem now, or else after many hours of getting your system back up you may find yourself right back with this problem.
Perhaps reinstalling the game would be helpful. Is there anyway in finding out exactly what the program has done and troubleshoot each aspect of the tweaking it did?
GL Alchemist hope to see you flying soon mate.
TS!
- posted later-
I did take a quick look around on the Net. I was at one particular site with @17 user reviews. Only 1 person liked the program. All the others had rather significant issues I'm afraid Al. While I prefer commercial programs opposed to freeware (or even shareware), I know a lot of what this program does can be accomplished by decent freeware apps.
Based upon only a quick review of this program at their site, perhaps in cleaning up your registry it deleted something related to IL-2. Again, maybe re-installing the game (which puts all your IL-2 registry entries back) would be more prudent then a reformat?
If you ever want a decent Registry cleaner, try Registry Mechanic (commercial) here
http://www.pctools.com/registry-mechanic/" onclick="window.open(this.href);return false; , which is produced by a different company btw.