What does classpnp.sys driver do in Windows 7?

Question

I rebuild a windows 7 machine and it worked until l install a network driver.  It start getting stuck when booting at Windows 7 logo for almost 30min or so then fine again after.

I tried to reboot it into safe mode bt it gets stuck after loading the classpnp.sys driver.

What can it be?

Answer 1

Did any changes to your computer prior?

If you have any unnecessary external device connected to the machine, you may unplug them & check if you are able to boot to the desktop.
a. Boot the computer to windows recovery options and select startup repair.
b. If startup repair fails, insert the Windows recovery disc and select command Prompt and type in: rename c:\windows\system32\drivers\classpnp.sys classpnp.old and select startup repair again.
You may try to run chkdsk from Windows Recovery Environment & then try to boot to the desktop normally.
a.Follow the steps from this link to boot into Windows Recovery Environment and open the command prompt.
b. In the command prompt window, type ‘chkdsk /r’ and press Enter.
NOTE:
While performing chkdsk on the hard drive if any bad sectors are found on the hard drive when chkdsk tries to repair that sector if any data available on that might be lost

Comments

problem is happening after l install network driver.