This is an ongoing problem from Vista, W7 seems to use the same driver as Vista as well. I use my computer for music production and the high DPC latency spikes cause a lot of interference in the smooth playback and recording of audio. I have traced it down to the ACPI battery compliant driver and with this disabled DPC latency is low enough for glitch free recording and playback of audio. But obviously having this driver off gives you no feedback as to the state of the battery and causes the laptop to just power down with no warning when the battery is empty. Now W7 is a bit better with DPC latency than Vista but still for a lot of people unusable with this driver on, which sort of defeats the object of having a mobile pc . Would it be possible to some how install the ACPI drivers in XP on a W7 machine? Or is there some other way of working with the W7 driver to eliminate the high DPC latency.

Just thought I would bump this a bit at my wits end here.

Hello The Glimmer Room,You can use Windows XP drivers by installing them in compatibility mode. My other suggestion would be to use the hardware troubleshooter with online support.