uptime is a simple utility for Windows that can be used to quickly
find out how long it's been since the last restart. The easiest way to see how long
the current system uptime is on Windows XP, Windows Vista, Windows 7, Windows 8, and
Windows 10 is simply to double-click on
uptime.exe and see the results.
uptime has no requirements and can be used without installation. For further
information, refer to
the official release information.