I'm still on Socket A with similar processor power but advanced AGP Graphic card.
Try and get hold of a matching Geil 1GB stick of ram off ebay.
Flash/youtube is now accelerated automatically by my graphic card GPU! It is supported by ati driver 10.1 and above which takes the load off old system CPU's!
You need to upgrade/buy a 4000 series ATi AGP card though!
Pref a 4670(Powercolor £60.00 in uk till recently), 4650(HDMI out) are less powerfull for certain things. Depends how long you want to stick with your older system on Windows 7.
Did you add any old drivers on instead of letting Windows 7 update download them? The old drivers like smbus, pci bus etc cause stuttering - so go thru them in Device manager>A driver and see if any will update online.
I found a couple that updated when prompted.
Did you install any xtra Codec packs??
Try reinstalling the envy24PT sound drivers.
They have them for Vista 32/64bit so might work on Windows 7! http://www.viaarena.com/forums/searc...searchid=38907
Did you download the latest Directx updates?
The ONLY program I get sound stuttering/crackle on now is Crysis, which plays on 'Medium' settings on Windows 7.(No probs on XP!)
Prob due to fact I use a AMD3000+ Barton when minimum AMD3200+ is recommended!
But then millions of others (even with modern up-to-date powerful systems) have problems with Crysis sound on Vista/Windows 7!