Aircraft performance fall off with Win 7? last call for explanation

[Pugo3]

Just one more attempt to see if there is any explanation for a general aircraft performance drop in Il-2 1946 from Win XP to Win 7?

I bought a very good gaming Win 7 laptop in 2009 after my Toshiba Win XP laptop went belly up. For almost 3 years I had thoroughly enjoyed Il-2 1946 on the XP laptop, but with the new Win 7 machine I noticed a decrease in aircraft performance from the beginning, though it took some time to sink in.

All aircraft I flew seemed to be about 10-15% underpowered in my new Win 7 set up. The one that stands out most is the F4U Corsair, where I would use the throttle as deftly as any other control during a tight close in rolling dogfight with an Oscar 20' above the water. It really required fine controll, or in you went, but you could master it and do amazing things. With the Win 7 laptop, I need to keep the throttle wide open, it always feels like a 'wallowing fight' All dogfights are this way, the AI less aggressive and fast, my machines hard to hold in fine manuevres due to underpowered state. Kills the fun real quick. This is true of all the aircraft I fought with, a real disappointment that I tried to remedy for years. I upgraded to Win 7 Pro, followed much advise, etc. The aircraft in another flight simm I use also are diminished somewhat from XP, so it doesn't seem to be a problem with Il-2 1946 per se.

I posted on the IL-2 forum and was pretty much met with blank looks, so apparently this is not the case for Win 7 users. If anyone else had this experience, it would be helpful to get an explanation. Some have mentioned framerates and that 'it may appear to be slower...' ,no, it IS slower - 3 years experience, you get to know your aircraft intimately. Think of having a motorcycle that you've driven for years; you know exactly how it handles. You then experience a performance drop, and some dolt leans in a tells you it's in you mind, but he's a tech expert, don't you know. Please, don't be that guy.

I have lapsed in playing the game due to this fall off, and am finally able to move on getting a new set up, so perhaps my suffering will end, but I would still like to know why the performance drop in aircraft performance. May never find out, but thought to give it one last attempt. Thank you to anything you can provide to this end.

p3