Dv5t-1000 CTO Sound sputters and OS slows down after a few hours

I am running Vista 32bit SP1 on a DV5T-1000 CTO machine, 4gb ram 2.0ghz c2d
I've noticed that after a few hours of use, usually after I leave the machine on alone and coming back to it, the sound completely degrades and the OS response completely slows down to a crawl. It is especially prominent if I go to something like youtube and watch a video. the whole thing sputters and stutters and sounds horrible and the os slows to a crawl.
however, if I pause the video, until it's fully loaded, THEN play it, all is well, and my OS goes back to full speed...
but the longer I leave my PC on the WORSE it gets. if I leave it overnight, and come back in the morning, the result is horrible. I have an audio alert to notify me if I have email. normally it just does a quick 'beeep-booop, taking about a quarter of a second' as it flashes the message in the corner. If i leave the machine on over night, the next morning the message will go 'b-e-e-e-e-e-e-e-e-e-e-e-e-p-p-p-p-p-p b-b-b-b-o-o-o-o-o-o-p-p-p-p-' and takes about 5 seconds to complete the notification!
At this point, if I try to restart the computer, or shut it down from the start menu, it does nothing. I go to start select restart, nothing. I go to start, select shutdown, nothing. I have to physically hold down the power button and kill the computer!
I've updated to all the latest drivers for all my components straight of the h-p site. I even tried upgrading my nvidia drivers to the latest from nvidia.com. that didn't work so I reverted back to the h-p ones (from LAST YEAR by the way, can we get an UPDATE!)
so please, tell me WHAT GIVES! In addition to using my computer for daily activities, I also produce music on it. And if I use my pc for more than 2 hours, and I want to work on music, I have to reboot or suffer as my computer completely locks up.
PS. this thing says I cant make a word using the letters h and p... is this a JOKE?!?!?!?!?!?!

sorry about my tone, I don't realize how I sound when I'm typing, though I do think it's ridiculous that a forum about h-p doesn't allow you SAY h-p
anyway, I'm still at a loss for what to do, and it just occured to me that this may not be the place to get official help. are there h-p people here? or should I be contacting support? I have a feeling all they're going to tell me is to update the drivers...

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Originally posted by Reaver
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On Thu, 22 Feb 2001 03:19:12 -0800 (PST), Freek wrote:
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Dv5t-1000 CTO Sound sputters and OS slows down after a few hours

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