Beware of quick fix programs expeciially ones that cost money. 9/10 most issues can be solved with some tweaks,free programs that at least get you acceptable performance.
Try Gamebooster. Its free and is used to close all unneeded background progs,services ect. I ran across it a few days ago and it helped solve a issue Ive been having for weeks.
I also use the veneturbo tool to setp my fsx.cfg.
Your description is way to vague. Turning on bloom, lots of ai, autogen,dx10, a heavily fragmented hd, lots of background progs, anti virus and a million other things can cause bad perfromance. Rather than writing a small book on the subject do a google search. There are tons of post on hoW to improve performance. Avsim,Nick,here and also on the bottom of that links page is a link to additional info and tweaking.
I have a old i7,2.6 ghz, 6 gigs ram, Vista 64 660 Ti 2 gig card and wiith Active sky,Ground Enviroment, Ultimate Terrain, Flight Enviroment. Even flying in the highly detailed A2a warbirds or fighers with lots of systems, Huds, I usually get 25 smooth locked unless there is alot of weather.