Hi Bud,
This happen to me as well and I fixed, you will need to have two hard drive one for windows and the second for library. I haven`t had any issue after that.
 
Thanks,
Raf.

robert_e_bone

The issue ended up being a hardware issue where the BATTERY for the laptop was somehow causing these massive spikes.  The INSTANT I removed the battery, the problems went away.
 

Are you sure it was a hardware problem. A number of people have reported on various forums that the Microsoft ACPI-Compliant Control Method Battery device driver causes huge spikes. That driver is technically speaking software, and removing the battery is throwing out the baby with the bath water. The laptop should run on battery with the driver disabled, but you will get no low battery warning.

I am sure memories have not faded too much but it was a over a year ago.

Since this was posted in April I have learned that turning off all my WIFI related processes stops all the spikes. I run between 90 and 105 μs consistantly. If you just disconnect from the internet the WIDI will try to reach out and touch someone, and it causes the spikes at least here.
 
J

On my old laptop, I greatly reduced DPC latencies by
1. turn off wifi
2. disable select suspend on USB under advanced power options
3. in device manager, disable Microsoft ACPI-Compliant Control Method Battery
4. Disable Virus Scanning so when I stop recording it doesn't try to scan the wave files (or create an exclusion for the projects folder in the virus scanner)
5. On Win 8, I use Windows Key + X then B to get to the screen that allows me to turn on presentation settings. This prevents the laptop from sleeping or considering the screen saver.
 
After doing these things, re-run your DPC check and see if you get some improvements.
 
When done tracking, re-enable Microsoft ACPI-Compliant Control Method Battery and turn off presentation mode.

jbow
Since this was posted in April I have learned that turning off all my WIFI related processes stops all the spikes. I run between 90 and 105 μs consistantly. If you just disconnect from the internet the WIDI will try to reach out and touch someone, and it causes the spikes at least here.
 

That's not bad for a prefab laptop.
A well-configured desktop will be significantly lower (3 to 24 uSec - no peaks above 40 uSec)
The lower the latency you're running (and the heavier the load), DPC latency becomes more of a factor
To work effectively at a 64-sample ASIO buffer size or lower, DPC latency needs to be low and consistent (no large spikes).