Driver Problems With Toshiba Satellite Laptop

Ok, my Toshiba Satellite laptop originally had Windows Vista on it, I then downloaded Windows 7 but today i went back to Vista because some things weren't supported like my brightness settings and stuff. however. Now that I went back, my computer seems alot slower. Also it never auto connects to the internet when I turn it on. I always have to "diagnose and repair" to get it started. The worst thing is though is I had absolutely no drivers.

I have no disk for my pc so I had to go on my other pc, download the correct internet driver, install it on my laptop then manually download all the drivers i thought I needed. Well, everything is working except for the slowness of the pc still and my audio! It sounds like crap. It used to sound soooo good for a laptop. So I updated drivers but then it gave me an error and said it wont work correctly and then it disabled my audio completely. So I rolled back my driver and now it just sounds like crap again.

Its literally so much of a difference that i dont even want to listen to music or play my games because the sound was one of the reasons I got this laptop. I hardly doubt anyone can help me because you'd have to have my specific model and drivers to figure it out. Man, I just dont know what to do. I fear there is nothing I can do

EDIT: Although, now I think I'm going insane. I feel sick to my stomach whenever I mess something up. At this point, I cant tell if the sound thing is in my mind or not. I mean, it always seemed so good. When i play music, it seems good at times but at other times it doesn't. I'm pretty sure its bad though. I wish I could just send this somewhere and get it all taken care of.

EDIT AGAIN: Phew, I fixed the audio problem by switching some settings. Man am a relived. Now I just gotta work on reinstalling things But I still dont know what drivers I'm missing and also why my computer seems so slow. Also there is a 30 second gap in between the loading bar boot and the vista logo sequence. I dont remember that before but its not the biggest deal.

Man... Edit again: Just wondering if anyone would upload all the different Windows sounds in Windows 7. I liked one of the themes and want to use it in Vista but forgot to back it up.