I don't know what change at my pc in the last days caused the dpc latency to go down again, but I'm happy
What I did in the last days (might be one of those):
Avast Update (There was a program update it might have finally fixed those issues)
Malwarebytes Anti-Malware Search (in the free version) -> deleted a few files and registry settings containing pup (there was something about the firewall and antivirus, I think the notification in the windows action center was disabled, PUM)
latest Windows updates
Updated a lot of programs to their newest version
uninstalled avast grimefighter, browser-addon and "easy access and mangement" (it might be called differently in english, it's the last point in the middle column in uninstall tool)
If there is something else I forget to write about I will edit this post
Hopefully the issue gets fixed for you now as well
I'm almost sure it was the avast update
I'm usign the free Avast version btw. so there might be issues in the avast firewall still (for the pro/internet security version), you have to test it on your system, because my issues might have been related to something else since I couldn't make out the source of the issue 100%
@RejZor this has nothing to do exactly with network and system latency
it's more like the responsivity of your drivers which cause sound cracks because the PC cannot handle the sound in real-time anymore because other unrelated drivers cause latency in the system
you probably won't recognize it while playing except for the sound issues (as far as I know)