Unjustified lag

[telopots]

I planned on speedrunning the game again,and it lags like horribly and sounds glitch and repeat themselves.No missing files.I could run it on my old laptop max settings 60 fps.
specs: -Geforce GTX 580
-win 7 64 bits
-12 gb ram
-intel iCore i7 CPU 960 @ 3.20GHz

Please help,google didn't.

[Johari]

When did the problem start?
Have you installed any programs or drivers recently?
Do you have any other audio output devices connected?
Did you experience the problem each time you tried playing HL2?

[telopots]

today
no
no
yes

[Johari]

Well, I don't know what to say then other than the usual.
Update drivers for your soundcard and other audio hardware, install legacy VC++ redistributables(2008, 2005) and verify cache or reinstall.

[telopots]

Done all of the above,still glitchin'

[Subscribenstein]

Same, my system is running pretty badly too. Perhaps the latest direct X doesn't emulate DX 9 very well?

[telopots]

I think they've updated the engine but effed up something,but it works for me now.