personally I I spent my time in the latest 27 hours doing tests on my computer.
I installed the
Device Doctor and guess what, any driver needs to be installed or updated.
I uninstall Avast 5 end install Avast 4.8 (latest version)
Avast 4.8 -
low DPC latency.
I uninstall avast 4.8 and install kaspersky.
kaspersky -
low DPC latency.
I uninstall kaspersky and install AVG.
AVG -
low DPC latency.
I uninstall AVG and install Avast 5 version 396.
Avast 5 version 396 -
low DPC latency.
I uninstall Avast 5 version 396 end install Avast 5 version 462.
Avast 5 version 462 -
very high DPC latency.
when I deactivated the P2P shield scan -
low DPC latency.
well, the only thing left to do its downgrade the drivers, but I will not do.
I'm using Avast 5 version462.
My sister's computer:have the exactly same result.
her computer has a conf. completely different from mine.
Next version of avast.I'll wait for the next version and see if the problem continues, I will create another topic again, end again,end again , end again, end again..........
thank for everything guys.