How to get hard drive serial number from command line on Windows computer?

Get the Manufacturers serial number of the hard drive.

    C:\>wmic diskdrive get serialnumber

Get the volume serial number:

    C:\>vol C:

Get Drive Info:

    C:>wmic diskdrive list brief
   
Get service tag report:

    C:>wmic csproduct get name,vendor,identifyingNumber


Determine when Windows was installed on a computer

    C:\>wmic OS Get InstallDate
InstallDate
20091204171103.000000+480

You can easly read the above output adding the relevant markup: 2011-02-14 13:36:58

The install date is stored in the registry value HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\InstallDate as UNIX time
 (32-bit value containing the number of seconds since 1/1/1970).
 
For more info get it at :
http://blogs.technet.com/b/askperf/archive/2012/02/17/useful-wmic-queries.aspx
http://theinterw3bs.com/wiki/index.php?title=WMIC_Commands
http://travisaltman.com/one-liner-commands-for-windows-cheat-sheet/