Aspose.Pdf and Aspose.Words installed on my PC without any problem.
Aspose.Cells complained straight away that .Net Framework 1.1 is required, so I installed that from the MS website (NB, 1.1 doesn't appear to be an option in Windows Update any more - a download is required). Once this was done, Aspose.Cells installer then runs, but almost at the point of completion, it reverses the install and fails. There is a warning about Data Execution Prevention, "a security feature that can help prevent damage to your computer".
I turned off DEP for Aspose.Cells.msi but that doesn't make any difference.