Today, almost all modern computers run on 64-bit versions of Windows 10 or Windows 11.
Yes and no. Adobe InDesign can open PageMaker 6.5 files (up to InDesign CS5). Newer versions (CC 2023/2024) have dropped PageMaker filters. Your best bet: Use InDesign CS6 (32-bit) in a VM to convert old files to .indd or .idml . Download Adobe Pagemaker 6.5 64 Bit