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Windows 7: Usbport.sys causes high DPC over time.

29 Aug 2013   #41

Windows 7 Home Premium 64bit

thanks. successfully fixed that issue, although according to latencymon, i still have bad latency from acpi.sys...

My System SpecsSystem Spec
29 Aug 2013   #42

Windows 7 Ultimate x64

Quote   Quote: Originally Posted by ben561 View Post
thanks. successfully fixed that issue, although according to latencymon, i still have bad latency from acpi.sys...
Never had any issues there so can't help you with that one unfortunatly.
My System SpecsSystem Spec
29 Aug 2013   #43

Windows 7 Home Premium 64bit

OK FINALLY fixed this issue, there is a massive forum at Dell Studio 15/17/XPS & Other DPC spike issues - Workaround - Page 50 - NI User Forums that helped me out further.

you have to download process hacker, process explorer (another version) wouldnt allow me to suspend the acpi.sys

then once you SUSPEND the two driver threads - acpi.sys - then latencymon shows green along with green dpc latency checker. FINALLY
My System SpecsSystem Spec


 Usbport.sys causes high DPC over time.

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