I thought I'd add my system info:
OS Name Microsoft Windows 7 Home Premium
Version 6.1.7601 Service Pack 1 Build 7601
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name LATKA-VAIO
System Manufacturer Sony Corporation
System Model VPCF226FM
System Type x64-based PC
Processor Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz, 2001 Mhz, 4 Core(s), 8 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. R1170V3, 4/20/2011
SMBIOS Version 2.7
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume2
Hardware Abstraction Layer Version = "6.1.7601.17514"
Installed Physical Memory (RAM) 8.00 GB
Total Physical Memory 7.98 GB
Available Physical Memory 5.35 GB
Total Virtual Memory 16.0 GB
Available Virtual Memory 12.6 GB
Page File Space 7.98 GB
Page File C:\pagefile.sys
Also, the DPC Latency Checker is all over the place. It can go for several minutes spiked above 16000ms, but I've also had a stretch or two of 1-2 minutes with everything under 1000ms. Here is another screenshot:
