can you boot into Safe Mode?
Can you run scanreg.exe and scandisk.exe from your Windows 98 start disk?
Sometimes scanreg/scandisk will fix this issue - often caused by removing certain software - Norton is often a culprit and has damaged many a 98 system of mine.
You can also download the file and copy to the System32 directory at the dos prompt. Again this doesn't always work but has for me in the past. Here's a link:
http://www.dll-files.com/dllindex/dll-files.shtml?halOnly other option I can offer is a reformat of that drive and re-install.
good luck

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