Boot to black screen

Hi all, a bit of a long question, please bare with me.

I have Win7 build 7201 running on my laptop. Sometimes, when booting on different power than when shut down (ie shutdown on cord, and boot on battery), boot sequence halts on black screen.

I suspect a message is prompted outside screen view area, and resolution problems prevents me from seeing this.

SO.... Any knowledge on why this black screen on "different power"-boot appears, and if there is any solution. ??? When it happens, I have to insert boot-dvd, and perform a repair with the "Startup repair" and restart. Then it boot nicely

I have seen some warnings in the performance log, which indicate delays in ACPI-driver for NT.... can I update this driver software???


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