Best Answer: 1- remove ur antivirus program
2- reinstall it & update to current
3 go to run
4 type "sfc/scannow"
5- Insert winxp service pack 2 CD into cdrom
or
brother go this link & solve ur problem
http://www.securitystronghold.com/solutions/cannot-find-problems/windows-cannot-find-null.html
Re:Well… problem solved, I guess.
I moved the sound card from PCI slot 5 to PCI slot 3, then partitioned and formatted the drive again. After installing W98SE, I first installed and set all the things I could think of (such as Promise ATA/100 controller, video card, desktop resolution, etc. etc.), and then switched the drive to the ATA/100 controller. I then installed the software for the sound card, and all went well.
Now the weird thing is… I had already changed the card from PCI slot 5 to PCI slot 3 before (I also tried PCI slot 2, but while booting a message was displayed that this slot shared its IRQ with the Promise ATA/100 controller, so I moved it back to PCI slot 3), and the only difference this time is that I hooked up the drive to the Promise controller PRIOR to installing the software. At other times, I wanted to install the sound card first, then move it to this controller afterwards.
Anyway… thanks for all your help. I'm still not quite sure why it works this time, but I'm obviously happy.
Gracias, senores!
Re:That NIC 905C is an ISA, right? You are sharing PCI5 with your ISA slot, it's generally good to avoid using your last PCI slot if you're using an ISA card. For similar reasons, you should avoid PCI1 because it shares with AGP. Depending on your mobo, I believe PCI 3 and 5 may also share some resouces, check your manual. I think you just have too much "bad" sharing going on. Try this:
PCI2: modem
PCI3: SB Live
Make sure your BIOS is configured for PNP OS and Auto assignments of resources. 
Re:Thanks for your help, guys. I'll try both suggestions tomorrow, and post the results.
badthad: Precisely. All I am doing is removing the Western Digital drive, and replacing it with the IBM. Currently, here's the "layout" of my interfaces:
AGP slot 1: ATi Radeon 64MB DDR ViVo
PCI slot 1: empty
PCI slot 2: empty
PCI slot 3: ISDN modem
PCI slot 4: empty
PCI slot 5: SoundBlaster Live!Platinum 5.1
As I said earlier, I install the software for the ATi Radeon, and it works fine. I install my printer, and it's fine. I install the ATA/100 drivers, it's fine. Then I go to install the sound card software, and it screws up… WTF? 
Re:So, you're saying ALL the exact same hardware works perfectly on the 1.6gig drive OS? Why don't you just clone the old hard drive onto the new one instead of reinstalling everything?
Other than that, I would try removing all the PCI cards except the sound blaster. Then reinstall the OS with ONLY that card. Then go back and add the other cards one at a time. It sounds to me like one of them doesn't want to share an IRQ, but I'm perplexed by the fact that your old HDD operates fine.
What PCI slots are you using and what's in each one?
Re:This may sound weird but try ibmatasw.exe from the IBM website and lower the ATA Specification to Ultra66 or even Ultra33 to see if that has any effect.
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