I created an installation package by using the Package & Deployment utility. The setup file gives this error on the users' PCs running Win XP or Win 98: "Setup cannot continue because some system files are out of date on your system. Click OK if you would like setup to update these files for you now." Those people who have Win XP on their PCs get the same error even if they click OK. Those with Win 98 get another error saying that they must update Windows before Setup can continue. I never had this problem before I started using Vista as my operating system. I even recompiled my program on an old PC running Win 98 and then used the Package & Deployment utility to create another setup package, but the problem persists. Can anybody help, please?