Windows stuck at both normal and safeboot

classpnp.sys is used by Windows for interaction with hardware devices.

Remove all unnecessary hardware e. g.

• USB thumb drives
• USB hard disks
• joysticks
• headsets
• webcams
• additional keyboards when using a laptop

Try booting again.

If that works, try to find out which hardware created the problem by plugging in one, reboot, plug in the next, reboot, and so on.

If that does not work, the main suspect is the hard disk.

Boot your computer from a Windows or Linux live media (DVD, USB drive).

If there is very sensitive data on your PC, consider cloning the disk before you run the next steps.

If using a Windows live media, use chkdsk /f /r multiple times. This will scan your harddisk for errors and repair them. One run of chkdsk /f /r might correct a set of errors and find others, so run it multiple times.

Reboot after that and look whether you can start now. If you can start, depending on the age of your harddisk, consider

• reinstalling Windows on the same harddisk.
• buying a new harddisk and reinstall there.

Recent Questions...