Thursday, 15 August 2019

boot - How do I troubleshoot Windows 7 when it is stuck booting on classpnp.sys?


Since yesterday my main Windows 7 computer (an HP portable) won't boot. The apparent cause was a disk error, which seems to be fixed (but not sure, as chkdsk went fine. At first it couldn't find the boot loader (which I fixed with bootrec), and later complained of I/O errors in winload, later in other drivers.



  • System restore fails with a broken system.sav

  • System repair says the system is OK (but it did repair a few issues). Still its log shows problems

  • I replaced drivers from the original CD (which might have been a bad idea), but fixed some more

  • sfc /scannow says everything is OK (even specific file)


Do I have any options left apart from doing a full reinstall? (which apparently won't preserve my settings, as I cannot do an update from Windows -- it won't boot)


I've spent 8+ hours trying a few things!



Answer



I would start by making a mirror copy or a full backup of the drive and then take a look at the SMART status of the "failed" drive. Your best bet for a SMART utility should be to start at the Drive's manufacturer website and check what they offer as far as diagnose utilities. Such utility may reveal that the drive is indeed failing or that the failure is at a logical level. Based on that finding I would pursue either fixing the original drive (logical failure) or the mirrored drive (imminent drive failure). Good Luck!


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