BlackBerry product.dll is missing error

"The issue turned out to be the software I was installing.

I uninstalled that software and used the CD that came with the BlackBerry, and that worked fine.

I believe what I installed may be found on this page if you select the ""BlackBerry Desktop Software 5.0"" item from the drop-down. Since I installed it from the CD, I can't be 100% sure that this is the same as what I used, but it seems likely.

After installing, you can check for updates and get the service pack from within the application, so there is no need to download the service pack separately from that site."