>Since I've rebuilt my PC with Windows XP Professional, I am frequently receiving "Index file does not match the table. Delete the index file and re-create the indes." when I go to open a table. If I click OK, the table opens and I can then set the index to whatever index I care to use. The index seems to be perfectly fine and we do have users that are pounding these indexes all day.
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Try to disable anti-virus software on your PC and see it it helps.