Hi Olds,
I was having similar issues as late as June 30... My framerate had slowed to 10-15 FPS and I was CONSTANTLY getting disco'd and having lockups and CTDT problems. I thought it couldn't possibly be my machine or ISP and blamed HTCs equipment.
(As it turns out, I owe HTC a public apology for a scathing forum thread and several sarcastic posts)!
I tried uninstalling the game and reinstalling it, tweaking my system settings, and reinstalling/upgrading my graphic and sound drivers, all without fixing the gameplay issues that were making Aces High unplayable on my machine. I play on a year old high end HP laptop with Windows Vista Home, connecting via DSL.
I was desperate so I backed up my files (including the gunsights and sounds folders from Aces High) and wrote down my AH login and password. I then restored my system to the original factory image. I did have to reinstall AH and re do the settings I use in game once my machine was back "up".
THE RESULT: amazing! No more disco's, no more CTDTs and a 50-60 Frame Rate!! and my computer performs like the day I unpacked it!!
Olds if you use a Vista or XP machine you might want to try system restore and restore your machine to a date prior to having your problems. If that fails you could reinstall windows like I just did. Don't fail to back up your files BEFORE you use system restore or reinstalling windows. Having fought against you and winged with you, giving up easily doesn't seem like "you" my friend. Using the same fix I did will take a few hours, but it was worth it IMHO. System Restore is quicker. Don't resign so quickly... If I was the AAs CO, I would NOT accept your resignation until you have exhausted efforts to resolve your problem. Your problem sounds like a software or system resource issue to me... Don't spend the dough on a new machine (yet) particularly if it is less than 3 years old until you have at least tried to "fix" it. Feel free to PM me if you need (or want) my help.