Unexpected error from external database driver (8458)

Hi all,

I have been linking dfb files to MS Access 2003 for some time, always reading successfully (my VB app runs queries using these linked files). My client updated to Access 2007 a couple of months ago and again it was sucessfully reading the .dbf files until last week. Suddenly they are getting the error: Unexpected error from external database driver (8458)

Thinking that maybe the dbf files were corrupt I tried linking and importing other .dbf files but get the same error. I transferred the files to another PC with Access 2007 and can successfully read the files.

I have tried reinstalling Office 2007, installing Office 2007 SP1, and WinXP Pro SP3. I have also tried reinstalling MDAC and I have uninstalled Access 2007 but am still getting the same problem. Of course, I can't find any reference to this error on Microsoft website for 2007, only for 2000. Have tried the suggested fixes but no luck.

Any ideas???