매직마우스를 xnote에 붙이려다가 애꿎은 시스템만 망가뜨렸다.

여러 가지 검색해 보니, 아무래도 classpnp.sys가 잘못된 것 같다.

현실적인 해결책 중 하나로 아래의 링크를 따라가볼 생각이다.

http://androidyou.blogspot.com/2010/06/fixed-classpnpsys-problem.html

1. Copy the Classpnp.sys file from another PC to an external hd or USB drive. PLEASE Note, 32 bit /64 bit system differs. Make sure you get the same version as you OS.
2. Insert one windows DVD to the dvdrom, try boot with the DVD, to setup a New OS (don’t click to go further, all we need is just a command promot that we can copy the file from USB to your Primary HD), For MACbook, Hold and Press “C” to initial the setup.
3. after the setup GUI is loaded, Run “Shift + F10” to Bring a Command Prompt, this feature has been in the Windows setup GUI since win 2000. So for step 2, inserting any version of windows is fine.

아래의 해결책이 그럴싸해 보인다. (출처: http://social.technet.microsoft.com/)

Solution 1: Tap F8 until you see the boot options.
Select repair system (the first option on the list).
Let this load and follow the on screen instructions.
Click the Command Input (the bottom option on this new list) This will open a window resembling DOS.
Type in "Rename C:\windows\system32\drivers\classpnp.sys classpnp.old Press enter and then close.
Restart your computer.

This does not work. This just caused a Blue screen and a continuation of the infinite restarting loop I was suffering before. 

Solution 2: I have found system repair disks for both Windows 7 and Vista. If you brought your computer from a major retailer you most likely did not get these disks. Also if your computer is from a company such as Acer, Compaq, HP etc you most likely did not get these disks either.
They are available from this web site, http://neosmart.net/blog/2008/windows-vista-recovery-disc-download/

Download the one that suits your OS (all free).

You will then need to download Imgburn. This program will put your recently downloaded recovery disc onto a disc (this is necessary because of the file type). Imgburn is freeware from this site http://www.imgburn.com/
Shut down your computer, and restart. Put this disk in your computer and boot from it. Follow the instructions. Once completed and if works you may find some of your docs photos etc missing. If you can find away of backing these before doing this I recommend doing so.

Solution 3: This requires more downloading and the software Imgburn that I talked about above. You need to go this web site http://www.ubuntu.com/ and download the software Ubuntu 9.10 Desktop. Once downloaded the process is similar to the one above. Burn the downloaded ISO file, using ImgBurn, to a disk. Shut down your PC and start it up again.
Once that is completed insert the disk into the computer and boot using the Ubuntu software. This acts like a Operating system.
Now that you are somewhat able to use your computer find the file C:\windows\system32\drivers\classpnp.sys Rename Classpnp.sys to Classpnp.bak
Now got this website http://www.hotfile123.com/index.php?q=classpnp+sys and download the classpnp.sys file. Replace the old one that you have renamed with the newly downloaded one.
Exit and restart your system making sure you are going back into Windows 7 not Ubuntu. The system will lag for a bit but should eventually go into Windows 7 safe mode (assuming you ticked the Safe mode box in msconfig).

Solution 4: Wait for your computer restart again (or turn it back on). When your computer loads to manufacturers screen (one of the first screens you will see when starting you computer). Press either alt + F10 or alt + F11 (Acer users with have to use alt + F10).
Provided you still have Acer eRecovery installed, (or your brand of recovery system) it should come up. Once the software is loaded click the option that resembles RESTORE TO FACTORY DEFAULT SETTINGS. From this point the software should update the C drive with a fully functional image from a secret partition on the hard drive.
It is very important to note that this Secret Partition is very secret indeed, you can not see it or touch in almost any other way except for dong this. This process should take around ten minutes if working correctly.
When the software has finished running press OK and reboot your computer with fingers crossed (and any other limbs and appendages you have).

Solution 5. Wait for your computer start. Tap F8 to bring up the menu. Click system restore, this is the very first option. Wait for this to load. If its your first time, be gentle it may take a little while. Once it has loaded click on the Command Prompt and type in "Restore" with out the quotation marks of course. Press Y and go with the flow.

Solution 6: Reformat and reinstall your choice of windows; XP, Vista, Windows 7 or you could even go 98 if your system is compatible.

I don't really want to do this but I may have to yet. I will be going back to vista as I will wait for Windows 8. Luckily I also have all my video and music content saved on hard drive. The only thing I am going to loose are my save game files but I that is no where near the end of the world now is it.

There is also the last, well can't really call this a solution lets call it an option.

Option 7: Find the nearest high rise building, the tallest building in your area should do. Climb to the top using any means necessary (ladder, stairs, elevator etc.) and drop it off the top. This will wipe your system and relieve any stress built up by the problems caused by CLASSPNP.SYS

classpnp, windows7, booting