The following is from the microsoft knowledge site, hope it helps,
<A HREF="http://support.microsoft.com/support/kb/articles/q255/2/66.asp" TARGET="_blank">http://support.microsoft.com/support/kb/articles/q255/2/66.asp</A>
Error Message When You Press CAPS LOCK
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The information in this article applies to:
Microsoft Windows 98
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SYMPTOMS
When you press CAPS LOCK or BACKSPACE, you may receive the following error message:
A Fatal Exception 06 has occurred at 0000:00000017
CAUSE
This issue can occur if you have a Hewlett-Packard ScanJet 5100C/5200C scanner installed, and a Hewlett-Packard DeskJet 970 printer is attached to the parallel port on the scanner.
RESOLUTION
To resolve this issue, contact Hewlett-Packard to inquire about the availability of a fix for this issue.
To work around this issue, uninstall the Hewlett-Packard DeskJet 970 printer driver that came with your printer, and then install the Hewlett-Packard DeskJet 970 print driver from your Windows 98 CD-ROM by using the Add Printer utility.
MORE INFORMATION
For additional information about this issue, please view the following Hewlett-Packard Web site:
<A HREF="http://www.hp.com/cposupport/scanners/support_doc/bps03577.html" TARGET="_blank">http://www.hp.com/cposupport/scanners/support_doc/bps03577.html</A>