Windows hangs at classpnp.sys - you can do that

If Windows hangs at classpnp.sys, a cable may be defective. This practical tip shows you how to fix the error.

Windows hangs at classpnp.sys - so the boot process is successful again

The following solutions will help you fix the problem in most cases.

• First switch to the BIOS. To do this, you must hold down the [F8] key during the startup process. For some devices it is alternatively the key [F2], F6] or [F10].
• In the BIOS you have to make sure under "Boot device priority" that your hard disk is in the first place and all other devices below it.
• Also make sure that all devices such as DVD drives, hard drives, etc. are recognized in the BIOS.
• If a device is missing, you have already found the cause of this error here. If, for example, the DVD drive is missing, it was not recognized by Windows and the error was therefore output.
• In this case, open the housing of your PC after disconnecting it from the power supply and remove all cables from the DVD drive. This is possibly the fault, which is why you have to replace the cables.
• Then start your PC to test whether the error continues to occur.
• If this is the case, you should use Windows Update to check for available updates for your PC.
• For laypersons, it is advisable to consult a specialist if there is a hardware defect.