Whenever I try to boot into safe mode my laptop locks up at Classpnp.sys. I've been reading that I need to replace it or rename it to Classpnp.old. the only problem is that the system won't let me. I'm on windows 7 x64 at the moment.
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right-click properties, and gain ownership of the file.
properties-> security-> advanced-> owner.
after that set permissions to read and write the file if you need to -
How to rename System32 files?
Discussion in 'Windows OS and Software' started by johnny89, Apr 20, 2010.