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Carsten KrupkeFlag for Germany

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Windows Server 2008 R2 boot problem - CLASSPNP.SYS

Hey Experts Exchanger,
we have Windows Server 2008 R2 which hangs in during boot. Looks like CLASSPNP.SYS causes this issue. Microsoft does not give any support with the Server anymore (we know) so we are looking for someone else to give us support in this case. Any Windows Server Specialists who can help?

Thanks in advynce,
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What is the server doing?

If it's a core system, I.E AD, DHCP, DNS etc, I'd just upgrade it and rebuild.

Have you booted into last known good configuration? Will it boot into safe mode?

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Hey Alex,

thanks for your response. 

last known good configuration does not work

it does not boot into safe mode, it stops booting @ classpnp.sys

Realistically, your best option at this point would be to yank a copy of classpnp.sys from a working  2008r2 machine and hope it works, you can back up your existing one from the recovery console on your F8

What sort of server is this? You've not said yet.
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Carsten Krupke
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Did you make registry changes PRIOR to this issue happening?