Check Your OS’s Installation Date
Linux:
ls -alh /boot/grub #the majority of files in this folder don’t change from the time of install except for menu.lst
ls -alh /restore #BSD
Windows:
Systeminfo #from the command line
- or –
CMD /K WMIC OS GET InstallDate
You’ll see the Operating System installation date (in WMI format). The first eight characters in that output gives you the installation date.
*Windows bit stolen from http://windowsxp.mvps.org/getosdate.htm
