How can I tell when Windows was installed on a computer


There are a few ways to determine when the version of Windows you are currently using was installed on the computer. Below is a list of each of the ways.

Finding Windows install date using systeminfo
Finding Windows install date in the registry

Finding Windows install date using systeminfo

Users who are running Microsoft Windows XP Professional, Windows Vista, Windows 7, Windows 8, or Windows 10 can use the systeminfo command to show when Windows was installed on the computer. To run and use the systeminfo command follow the steps below.

Note: If you’ve upgraded to a newer version of Windows (e.g. upgraded Windows 8 to Windows 10) the original install date shown is the date of the upgrade.

  1. Open the Windows command line.
  2. From the command line type the below command to only show the Original Install Date. If you are using a non-English version of Windows, this command may not work, and you may want to use one of the other options.

systeminfo|find /i “original”

If done properly and if the text is found you should get output similar to the example shown below.

Original Install Date: 12/17/2015, 7:09:50 PM


  1. Open the Windows command line.
  2. From the command line type systeminfo and press enter to get an output similar to the example below. The “Original Install Date” is when Windows was installed on the computer.
Host Name:                 COMPUTERHOPE
OS Name: Microsoft Windows 10 Pro
OS Version: 10.0.10586 N/A Build 10586
OS Manufacturer: Microsoft Corporation
OS Configuration: Standalone Workstation
OS Build Type: Multiprocessor Free
Registered Owner: Computerhope
Registered Organization: Computer Hope
Product ID: 00000-00000-00000-AAAAA
Original Install Date: 12/17/2015, 7:09:50 PM
System Boot Time: 3/28/2016, 6:57:39 AM
System Manufacturer: Dell Inc.
System Model: XPS 8300
System Type: x64-based PC
Processor(s): 1 Processor(s) Installed.
[01]: Intel64 Family 6 Model 42 Stepping 7 Genuine Intel ~3401 Mhz
BIOS Version: Dell Inc. A06, 10/17/2011
Windows Directory: C:WINDOWS
System Directory: C:WINDOWSsystem32
Boot Device: DeviceHarddiskVolume1
System Locale: en-us;English (United States)
Input Locale: en-us;English (United States)
Time Zone: (UTC-07:00) Mountain Time (US & Canada)
Total Physical Memory: 8,174 MB
Available Physical Memory: 2,955 MB
Virtual Memory: Max Size: 16,366 MB
Virtual Memory: Available: 6,455 MB
Virtual Memory: In Use: 9,911 MB
Page File Location(s): C:pagefile.sys
Logon Server: \MicrosoftAccount
Hotfix(s): 10 Hotfix(s) Installed.
[01]: KB3116900
[02]: KB3124200
[03]: KB3124262
[04]: KB3124263
[05]: KB3135173
[06]: KB3139907
[07]: KB3140741
[08]: KB3140743
[09]: KB3140768
[10]: KB3144756
Network Card(s): 2 NIC(s) Installed.
[01]: DW1501 Wireless-N WLAN Half-Mini Card
Connection Name: Wi-Fi
Status: Media disconnected
[02]: Broadcom NetLink (TM) Gigabit Ethernet
Connection Name: Ethernet
DHCP Enabled: Yes
DHCP Server:
IP address(es)
[02]: fe00::b0b0:0000:0000:0000
Hyper-V Requirements: VM Monitor Mode Extensions: Yes
Virtualization Enabled In Firmware: Yes
Second Level Address Translation: Yes
Data Execution Prevention Available: Yes

Finding Windows install date in the registry

The install date can also be found in the Windows Registry for all versions of Windows by following the steps below.

  1. Open the Registry.
  2. Browse to the path below.


  1. Once in the above folder locate the “InstallDate” file which contains the hexadecimal and decimal value of the date Windows was installed. Open the “InstallDate” file.
  2. Select Decimal to get the decimal value, which is the date in epoch time. Once this value is copied, you need to use an epoch converter to convert that value into a readable date. Below is an example of an epoch and its converted date value.

Epoch value: 1450404590

GMT value: Fri., 18 Dec. 2015 02:09:50 GMT

Additional information

  • See our systeminfo page for further information on this command.
  • See our epoch and install pages for further information on these terms and related links.

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