What is the difference between UpTime v2.00 and v1.03?

Version 2.00 is a complete rewrite of the software with updated Windows uptime calculation methods for modern systems. It adds the ability to double-click to copy values for Machine GUID, Build Lab, and Product ID. Version 1.03 is the legacy version that supports older operating systems like Windows XP, Vista, ME, 98, and 95.