I'm hoping my question can have a happy ending. In the mid-90's, I purchased Filemaker 3. When Filemaker 5.5 Pro was released, I bought the update CD, which requires the user to either have FM 3 installed or to have the installation CD for FM 3. I've used it all these years, most recently with Windows XP Pro, and it has worked just fine. The databases I began with were long ago converted to FM Pro 5.5 databases. I'm still using FM Pro 5.5 on a laptop with WinXP Pro, but in 2013, I purchased a PC with Windows 8. I haven't been able to install FM 3 on it, therefore can't install FM Pro 5.5.