Saturday, 27 January 2018

Windows 7 Pro x64 hangs on boot when loading classpnp.sys



Don't know what happened but this happens almost every time I boot. Never happened before a couple days ago and I haven't even done anything.


Computer powers up, GRUB (From fresh Ubuntu 11.04 install) loads, Windows 7 starts booting.


I configured msconfig to show the file it's currently loading when booting (The similar list you see when you boot into Safe Mode) and when it gets to C:\Windows\System32\DRIVERS\CLASSPNP.SYS, it takes a couple more seconds to load than other files if it doesn't hang.


Before the hang, my wireless LAN card is detected and then sound is activated (I can tell 'cause these lights on my laptop change to red when it's mute/disabled and blue when it's not). The hard drive makes the sound it makes when it's loading except the sound's constant (The HDD light's on. Not flashing like it usually does) meani. I can disable the touchpad but the keyboard doesn't work because the numlock light doesn't come on when I press numlock.


OS:     Windows 7 Professional x64 SP1
Laptop: HDX16-1155CA
CPU: Core 2 Duo P7450 2.13 GHz
RAM: 4 GB DDR2
HDD: 320 GB Fujitsu something

Also, I've tried sfc /SCANNOW and it said that my system is fine


Never happened before, all I have is the mouse installed


Update: Now it restarts sometimes while loading CLASSPNP.SYS



Answer



Ran the disk utility from Fujitsu and Memtest86+ and they found nothing.


Don't know what happened but the problem was randomly fixed one day. Think it was after some of Windows Update, don't remember. Didn't notice that it was fixed for a few days


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