Windows 10 Install time registry key

"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\InstallDate"

It's given as the number of seconds since January 1, 1970.

To convert that number into a readable date/time just paste the decimal value in the field "UNIX TimeStamp" of Unix Time Conversion online tool.

"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\InstallDate"

It's given as the number of seconds since January 1, 1970.

To convert that number into a readable date/time just paste the decimal value in the field "UNIX TimeStamp" of Unix Time Conversion online tool.

Original

http//stackoverflow.com/questions/170617/how-do-i-find-the-install-time-and-date-of-windows

jaclaz

"HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\InstallDate"

It's given as the number of seconds since January 1, 1970.

To convert that number into a readable date/time just paste the decimal value in the field "UNIX TimeStamp" of Unix Time Conversion online tool.

Yep, the original post was more regarding the InstallTime values, which appears to be new in Win10.
InstallDate has been around a while.

If you want to automate the parsing of the two values use my updated winnt_cv regripper plugin
winnt_cv