Sound crackling, clicking etc. when playing sounds

Mh...the thing is, i bought the soundcard BECAUSE of the soundproblems, it thought a soundcard would fix the problem (problem exists also without soundcard).
I'll try the motherboard drivers now.

dalchina said:

Hi, in the attachment I posted, you will see this:
PC Lagging very much usually when i make high network traffic
For me it was BitDefender's port scanning protection feature, once I'd disabled that problems were gone.Try this: open BitDefender, go to Modules (in the bottom) > Firewall and there disable Block port scans in the network and restart LatencyMon to see if it worked, changes should be immediate.

Problem with compressed memory process
USBPort.sys was the top offender in the LatencyMon report
I can confirm that Bitdefender Total Security 2016 is the culprit causing this problem on my system. After disabling the Firewall the CPU load went down immediately.

This may give you a clue.. but it may be sthg else in your case.
Try disabling your firewall?

This is useful (note- Win 7, same issue)
Usbport.sys causes high DPC over time. - Page 2 - Windows 7 Help Forums
- discusses interrupts, mentions WLAN (sometimes implicated)...

I made an account just to thank you man! I've been having this issue for the last month that started randomly. I've been trying drivers on and off and was considering a format. The bitdefender issue thing really fixed the problem for me. Thanks a lot!

Tried everything, meanwhile my mainboard and my graphics card died, i had to replace them both (now GTX460 + old ASRock Z77 PRO3).
Sound crackling is still there.

dalchina said:

Hi, in the attachment I posted, you will see this:
PC Lagging very much usually when i make high network traffic
For me it was BitDefender's port scanning protection feature, once I'd disabled that problems were gone.Try this: open BitDefender, go to Modules (in the bottom) > Firewall and there disable Block port scans in the network and restart LatencyMon to see if it worked, changes should be immediate.

Problem with compressed memory process
USBPort.sys was the top offender in the LatencyMon report
I can confirm that Bitdefender Total Security 2016 is the culprit causing this problem on my system. After disabling the Firewall the CPU load went down immediately.

This may give you a clue.. but it may be sthg else in your case.
Try disabling your firewall?

This is useful (note- Win 7, same issue)
Usbport.sys causes high DPC over time. - Page 2 - Windows 7 Help Forums
- discusses interrupts, mentions WLAN (sometimes implicated)...

Hello random internet stranger,

I literally just made this account to personally thank you. Basically, I have tried all the big anti-viruses: McAfee, Norton, Kapersky, and now Bitdefender. All with their pros and cons. Kapersky was actually really nice, not sure why I didn't just renew that, so I decided to try Bitdefender. Then, as soon as I installed it, the video and audio crackle/stutter began. Tried a bunch of things from other forums, but your advice to "disable Block port scans in the network" fixed it! It was only a few days of watching videos in agony, but I was going crazy. Thank you so so much. Everything is crisp and smooth again. I just want you to know that you made my day, heck my year. Guess you don't realize how important smooth video and audio is, or how often I watch videos, until it is suffering from stutters, popping, and crackling. Sorry for the ramble, I just wanted to thank you for your knowledge and insight, and saving me from calling tech support. You rock!!!

No ideas anymore?

@dalchina No ideas anymore? Too bad...

Folks, the problem appeared yesterday on my computer, and I solved it this morning.

Go to Device Manager. The first choice is your audio equipment. Open that. Somehow, some way, my default audio device was headphones, which I have never used on this machine. I made the speakers the default device, and the problem disappeared.