Hi Vanessa,
DPC Latency is not my expertise, so please take my advice with a grain of salt, but I took a look at your trace file and noticed that CompatTelRunner.exe is kind of running amok of your system. At peak it's using about 12.5% of your CPU resources, and at many points it was using between 90-100 disk service time. You could try uninstalling updates KB2952664, and KB2977759, or you can take ownership of C:\Windows\System32\CompatTelRunner.exe and rename the file (I would recommend making a restore point first). It may just have happened to have been working when you did this capture, but your ISR/DPC times seem quite low, and it looks like it's hard pagefaults that you're having issues with.