Yes, the software will efficiently work on any Windows machine and it is supported on all Windows Versions (Windows 8 and all below versions).
No, you need not have MS Outlook installed. The tool for MS Exchange OST analysis does not demand any specific applications such as Outlook or Exchange server installed on the system to generate previews of OST file.
No, OST File doesn't hold any kind of File Size Limitation
No Only you can view Open Read the OST File data without Exchange and Outlook Environment