Update your antivirus software and run a full system scan, several viruses
are known to disable this. For the menatime, create emergency copies, see www.dougknox.com and look in the WinXP Utilities for instructions or follow
this link: http://www.dougknox.com/xp/utils/xp_emerutils.htm
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Best of Luck,
Rick Rogers aka "Nutcase" MS-MVP - Win9x
Windows isn't rocket science! That's my other hobby!