Windbg: Get System / Process Uptime

It is first displayed when a dump is loaded in windbg.
Else, you can use the .time command

0:000> .time
Debug session time: Mon Feb 13 16:49:29.000 2012 (GMT+3)
System Uptime: 22 days 14:43:03.453
Process Uptime: 0 days 6:26:00.000
  Kernel time: 0 days 0:04:48.000
  User time: 0 days 2:26:11.000

Or use vertarget command:


0:000> vertarget
Windows 7 Version 7601 (Service Pack 1) MP (12 procs) Free x64
Product: Server, suite: TerminalServer
kernel32.dll version: 6.1.7601.17651 (win7sp1_gdr.110715-1504)
Machine Name:
Debug session time: Fri May 11 23:34:30.000 2012 (UTC + 3:00)
System Uptime: 3 days 9:16:56.894
Process Uptime: 0 days 0:14:54.000
  Kernel time: 0 days 0:00:19.000
  User time: 0 days 0:04:43.000