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missing or corrupt isapnp.sys & Ntfs.sys on boot up


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#1
gary55

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When I bootup I get a: Missing or corrupt file message on screen.
Sys32\DRIVERS\isapnp.sys
Sys32\DRIVERS\Ntfs.sys

After pressing 'r' a few times the computer proceeds to 'Windows' and logon. Computer is fully functional except that my PCI USB devices will not work. This affects my printer, iPod, digital camera to name a few.

I am using XP Pro Service Pack 1
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#2
Retired Tech

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Once it runs

Items in blue which are underlined are clickable to give more information about the process

Click start then run, type prefetch then press enter, click edit then select all, right click any file then click delete, confirm delete

Click start, all programmes, accessories, system tools to run disc clean up, then from system tools, run disc defragmenter.

Click start then run, type sfc /scannow then press enter, you need the XP CD and Windows File Protection will show a blue onscreen progress bar, when the bar goes, reboot


Is there a reason for not installing SP2
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#3
gary55

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Thank you...I will try these instructions. Do you suggest that I back up or copy to cd info that is important to me for this procedure? ie pics, data, music...
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#4
Retired Tech

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You can click on prefetch and sfc /scannow to see what they do, prefetch will just clear the start up info windows loads to help programmes start quickly

sfc /scannow will replace missing system files, it isn't concerned with anything else
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#5
gary55

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beautiful! Thanks. Will get back later ...cannot do it now...
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#6
gary55

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I found the problem to be in the BIOS where USB became disabled! Don't know how it got that way, but thank you for your help!
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#7
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Thank You for letting me know
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