When was Windows installed?

For different reason, you might want to know when Windows installed.

Luckily you can find this information other places then checking out the date on certain system files that was created/modified and stamped at the same time as when you installed Windows. The file date stamp method does not in calculate that files change this information during upgrades etc. during the lifecycle of the installation 

In registry, you have a Key to help you with this information.

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

Show hidden hidden devices in device manager

Back in the "old" days there was a registry setting to show all hidden devices in device manager

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment]

Just add "DEVMGR_SHOW_NONPRESENT_DEVICES" as a REG_SZ (String Value) with valuve 1

You have to use this to show devices that was not shown even after turning the "View - Show Hidden Devices" on.

So no, its not a typo in the title, its to show hidden hidden devices

Yesterday I got a great tips, that makes it posible to do the same thing with out addning registry setings.

How to use it can be found at this Microsoft articel here