System hangs at boot after loading CLASSPNP.SYS


  1. craftxbox
    Posts : 8
    Microsoft Windows 7 Home Premium x86-64
       New #1

    System hangs at boot after loading CLASSPNP.SYS


    Hi, i restarted my computer yesterday after i was getting bad frames in a game i was playing, and after that it wont boot up. i let it run for ~10 hours overnight and woke up to the same thing. i have searched and searched for the resolution but to no avail. I am able to boot into the WinRE environment and startup repair fails at the system integrity check (sfc) but when running it myself with the args /scannow /offbootdir=d:\ /offwindir=d:\windows\ it passes successfully. i manually removed a driver for a usb com port that i had installed recently but that didnt work either. trying to use safemode reveals the computer manages to load up to CLASSPNP.sys and then never continues. So right now im stuck, i have looked around and asked around to no avail. Can anyone help me diagnose?
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  3. Megahertz07
    Posts : 7,351
    Windows 7 HP 64
       New #2

    Your treat is market as Solved. Is it?

    Found this Windows 7 fails to go into safe mode. Stuck at classpnp.sys

    "i got to the harddrives and there was the problem, the cable was fine, but the d-drive (not the windows 7 drive) was not. After disconnecting it windows started and made me a very happy man."
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  4. craftxbox
    Posts : 8
    Microsoft Windows 7 Home Premium x86-64
    Thread Starter
       New #3

    i only have one AMD Radeon R3 240GB ssd plugged in. and no, its not solved
      My Computer
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