I have lost all of odbc drivers!

Hi all,
I know this is strange but I have lost all my odbc drivers that were installed by windows itself and other ones that I installed manually.I can't see them in odbc driver manager list and previously created datasources are not working.I have installed two things and I think one of them cause the problem:1.a report generator tool named agata 2.OpenLink universal drivers.
I checked know issues on both but no same experience recorded.Do you know how should I recover them?
Any help will be so appreciated.

Try reinstalling MDAC. This should have most of the drivers.