PDF-Tools supports all Windows (32/64 bit) operating systems from Windows XP and later:
Figure 1. Supported Operating Systems
Please note the following:
•We recommended that users install the latest Microsoft Windows service packs and updates before using our products, as doing so will ensure the greatest possible performance of the software.
•Our products - in particular the printer drivers that PDF-XChange Standard and PDF-XChange Lite utilize - are not designed to work in virtualized environments such as the XenApp software.
•There are some limitations to product support for Windows XP as Microsoft have stopped supporting it. Further information about this issue is available here.
•If you are using Windows 7 then please ensure you have the latest release and all available fixes - otherwise you may encounter issues, as detailed here.