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Dunno if anyone has come across this problem before, but I’ve been wrestling with it for the last two weeks. Last week when I turned my PC on, I was faced with the ‘Starting Windows’ black screen for an indefinite amount of time. No matter how many times I restarted the PC, it wouldn’t load past that splash screen (Win7 64bit). So I tried to boot from Safe mode, but it would stall at the line with driversclasspnp.sys.

I tried letting this idle for 20 mins but it would still stay at this screen. So I tried to do a startup recovery with the Win7 installation disc. When I boot from disc and come to the ‘Repair Computer’ screen, the screen just stalls, preventing me to select any of the repair options. At my wits end I just said feck it and did a re-install of windows on a new partition of a new HDD. Everything was fine for a couple of days, but its back to hanging on the classpnp.sys again. I have no idea what I can do, so I’m turning to the collective known as ETF2L to show me the way…help me…

Quoted from octochris

Does this still occur if you disable everything ACPI related in your BIOS? I fixed this for someone at LAN after a while headscratching, it seems that classpnp.sys calls some ACPI functions which can cause a stall on certain configurations.

ACPI eh? Lemme have a looksee.

Edit: Well it did something. I was in the middle of another windows reinstall when it stalled again at the setup screen and I did a restart. So I loaded up BIOS and disabled ACPI. It did a few restarts and now its on the Windows Boot Manager screen with a massive error saying: Please insert your installation disc and restart computer’ even though there is a disc in there and boot priority is set correctly.

WHAT IS THIS I DONT EVEN.

>.<