Is there a CLASSPNP.sys boot error fix yet?
I've read through all the information I can find on technet about this problem but have yet to find a concrete solution. Basicaly the system wont move past the windows animation at startup and when put in safe mode it hangs when trying to load classpnp.sys I've tried: Upgrading the BIOS copying an older classpnp.sys through a ubuntu live cd. It just tells me that it cannot mount the drives because they are in use due to a bad shutdown. Windows 7 Repair disks: these simply hang and present me with a black screen after getting past the small load bar. Any ideas?
March 7th, 2010 3:20pm

I've read through all the information I can find on technet about this problem but have yet to find a concrete solution. Basicaly the system wont move past the windows animation at startup and when put in safe mode it hangs when trying to load classpnp.sysI've tried: Upgrading the BIOS copying an older classpnp.sys through a ubuntu live cd. It just tells me that it cannot mount the drives because they are in use due to a bad shutdown. Windows 7 Repair disks: these simply hang and present me with a black screen after getting past the small load bar. Any ideas? hi , click the link ' microsoft support ' in my signature , go down and get a chat with the microsft support staff , they will probably be able to help you have a nice dayScan with OneCare + Support ENDING for windows Vista & XP ! + Plagued by the Privacy Center? REMOVE IT + Threat Research & Response Blog + Sysinternals Live tools + TRANSLATOR + Photosynth + Microsoft Security + Microsoft SUPPORT + PIVOT from Live Labs + Microsoft Live Labs + Get OFFICE 2010 FREE ! + Windows LIVE !
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March 8th, 2010 2:54am

It should be a hardware compatibility issue. You may boot in WinRE and run System Restore to restore the system to a previous version. Then I suggest you download the latest chipset drivers for your motherboard and install them. Please note that they need to be indicated as compatible with Windows 7.Arthur Xie - MSFT
March 9th, 2010 11:09am

It should be a hardware compatibility issue. You may boot in WinRE and run System Restore to restore the system to a previous version. Then I suggest you download the latest chipset drivers for your motherboard and install them. Please note that they need to be indicated as compatible with Windows 7. Arthur Xie - MSFT hi , bios updates dont hurt neither , ... on top of that a simple diskcheck after the updates drivers with both options flagged can solve loads of problems later on have a nice dayScan with OneCare + Support ENDING for windows Vista & XP ! + Plagued by the Privacy Center? REMOVE IT + Threat Research & Response Blog + Sysinternals Live tools + TRANSLATOR + Photosynth + Microsoft Security + Microsoft SUPPORT + PIVOT from Live Labs + Microsoft Live Labs + Get OFFICE 2010 FREE ! + Windows LIVE !
Free Windows Admin Tool Kit Click here and download it now
March 14th, 2010 11:18pm

I had a similar problem with a home-built system... Ultimately I went into the BIOS and increased the DRAM voltage from the default (SPD) value to something higher. In this case 1.63 volts worked with my 4GB of Corsair memory (SPD value is 1.5). A little post op research turned up the fact that the manufacturer recommends 1.7 volts if you have 8GB memory. If you're worried about frying your memory or voiding your warranty, you might wish to consult with the manufacturer. Don't overdo it, as you can damage your DRAM if you set the voltage too high. I had earlier suspected a memory problem but didn't try to change any settings until I spoke with an AMD customer service agent about RMAing the processor. Although my memory speed is correct for the CPU, I took a hint from his comment that degradation can happen over time with faster memory and tried the overclocker's trick of increasing the DRAM voltage even though I'm not overclocking. The same trick has worked in other situations where I've tested the DRAM and found it to be faulty. I tried several other things and they didn't help so you may wish to try this first if you're having this problem. You may have to dig around in BIOS settings to find it or it may not be there at all...good luck.
August 19th, 2011 5:26pm

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