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There is a very useful Windows command that Microsoft didn’t include in any version of windows but should have.  This is the uptime command.  There is a knowledge base article here.  It was released back in the Windows NT days, but still works on all current versions of windows.  I have found this to be an easy way to find out the uptime of the windows servers I maintain without have to log on to the box. 

To install just download uptime.exe and place it in the windows directory.  Then run it from the command line. 

uptime /? will give a listing of all the options and uptime /help will give detailed instructions.

UPTIME, Version 1.01
(C) Copyright 1999, Microsoft Corporation

Uptime [server] [/s ] [/a] [/d:mm/dd/yyyy | /p:n] [/heartbeat] [/? | /help]
        server          Name or IP address of remote server to process.
        /s              Display key system events and statistics.
        /a              Display application failure events (assumes /s).
        /d:             Only calculate for events after mm/dd/yyyy.
        /p:             Only calculate for events in the previous n days.
        /heartbeat      Turn on/off the system’s heartbeat
        /?              Basic usage.
        /help           Additional usage information.

Uptime works by checking the windows event logs for startup and shutdown times.  Running uptime with the /s switch will provide more detailed statistics as shown below.  If the event log has been cleared or is corrupted uptime will not show correct stats.

I have found it helpful to set up .bat files with the servers I want to check.  This then gives me a quick list of the uptime of various servers.  It is quite a useful command.  I’m not sure why microsoft didn’t just stick it in the directory with all their other commands.

C:\uptime \\myserver -s

Uptime Report for: \\myserver

Current OS: Microsoft Windows Server 2003, Service Pack 2, Multiprocessor Free.
Time Zone: Eastern Daylight Time

System Events as of 6/6/2008 9:59:47 AM:

Date:      Time:        Event:               Comment:
---------- -----------  -------------------  -----------------------------------

 12/2/2007  1:18:11 PM  Shutdown
 12/2/2007  1:20:14 PM  Boot                 Prior downtime:0d 0h:2m:3s
 12/4/2007 10:45:19 PM  Shutdown             Prior uptime:2d 9h:25m:5s
 12/4/2007 10:47:23 PM  Boot                 Prior downtime:0d 0h:2m:4s
12/16/2007  9:23:16 PM  Shutdown             Prior uptime:11d 22h:35m:53s
12/16/2007  9:25:30 PM  Boot                 Prior downtime:0d 0h:2m:14s
  3/1/2008 10:51:12 PM  Shutdown             Prior uptime:76d 1h:25m:42s
  3/1/2008 10:54:05 PM  Boot                 Prior downtime:0d 0h:2m:53s
 3/16/2008  5:04:48 PM  Shutdown             Prior uptime:14d 17h:10m:43s
 3/16/2008  5:07:07 PM  Boot                 Prior downtime:0d 0h:2m:19s
  4/9/2008  7:00:38 PM  Shutdown             Prior uptime:24d 1h:53m:31s
  4/9/2008  7:02:47 PM  Boot                 Prior downtime:0d 0h:2m:9s
  4/9/2008  7:23:35 PM  Shutdown             Prior uptime:0d 0h:20m:48s
  4/9/2008  7:25:47 PM  Boot                 Prior downtime:0d 0h:2m:12s

Current System Uptime: 57 day(s), 14 hour(s), 34 minute(s), 44 second(s)

--------------------------------------------------------------------------------

Since 12/2/2007:

           System Availability: 99.9941%
                  Total Uptime: 186d 19h:25m:42s
                Total Downtime: 0d 0h:15m:54s
                 Total Reboots: 7
     Mean Time Between Reboots: 26.69 days
             Total Bluescreens: 0