How To Find Computer Id Windows 7

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There are many reasons why you might want to find the security identifier (SID) for a particular user's account in Windows, but in our corner of the world, the common reason for doing so is to determine which key under HKEY_USERS in the Windows Registry to look for user-specific registry data.

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There are many reasons why you might want to find the security identifier (SID) for a particular user's account in Windows, but in our corner of the world, the common reason for doing so is to determine which key under HKEYUSERS in the Windows Registry to look for user-specific registry data. If you upgraded to Windows 10 for free from Windows 7 or Windows 8.1, you should have a digital license instead of a product key. Windows 10 Store App If you bought Windows 10 Home, Professional, or Upgrade to Pro in the Windows 10 Store app, you'll receive a digital license instead of a product key.

Regardless of the reason for your need, matching SIDs to usernames is really easy thanks to the wmic command, a command available from the Command Prompt in most versions of Windows.

See How to Find a User's SID in the Registry further down the page for instructions on matching a username to an SID via information in the Windows Registry, an alternative method to using WMIC. The wmic command didn't exist before Windows XP, so you'll have to use the registry method in those older versions of Windows.

Follow these easy steps to display a table of usernames and their corresponding SIDs:

How to Find a User's SID With WMIC

It'll probably only take a minute, maybe less, to find a user's SID in Windows via WMIC:

  1. Open Command Prompt.

    In Windows 10 and Windows 8, if you're using a keyboard and mouse, the fastest way is through the Power User Menu, accessible with the WIN+X shortcut.

    If you don't see Command Prompt in the Power User Menu, type cmd into the search bar in the Start menu, and click Command Prompt when you see it.

    You don't have to open an elevated Command Prompt for this to work. Some Windows commands require it, but in the WMIC command example below, you can open a regular, non-administrative Command Prompt.

  2. Type the following command into Command Prompt exactly as it's shown here, including spaces or lack thereof:

    ..and then press Enter.

    If you know the username and would like to grab only that one user's SID, enter this command but replace USER with the username (keep the quotes):

    If you get an error that the wmic command isn't recognized, change the working directory to be C:WindowsSystem32wbem and try again. You can do that with the cd (change directory) command.

  3. You should see a table displayed in Command Prompt. This is a list of each user account in Windows, listed by username, followed by the account's corresponding SID.

Now that you're confident that a particular user name corresponds to a particular SID, you can make whatever changes you need to in the registry or do whatever else you needed this information for.

If you happen to have a case where you need to find the user name but all you have is the security identifier, you can 'reverse' the command like this (just replace this SID with the one in question):

How to Find a User's SID in the Registry

You can also determine a user's SID by looking through the ProfileImagePathvalues in each S-1-5-21 prefixed SID listed under this key:

The ProfileImagePath value within each SID-named registry key lists the profile directory, which includes the username.

For example, the ProfileImagePath value under the S-1-5-21-992878714-4041223874-2616370337-1001 key on my computer is C:Usersjonfi, so I know that the SID for the user 'jonfi' is 'S-1-5-21-992878714-4041223874-2616370337-1001'.

This method of matching users to SIDs will only show those users who are logged in or have logged in and switched users. To continue to use the registry method for determining other user's SIDs, you'll need to log in as each user on the system and repeat these steps. This is a big drawback; assuming you're able, you're much better off using the wmic command method above.

Windows doesn’t display your PC’s serial number anywhere in its interface, and neither do popular system information tools. But you can often find a PC’s serial number with a simple command, a peek in your BIOS, or on the hardware itself.

Run the WMIC Command

Open a Command Prompt window to get started. On Windows 10 or 8, right-click the Start button and select “Command Prompt”. On Windows 7, press Windows + R, type “cmd” into the Run dialog, and then press Enter.

At the Command Prompt, type the following command and then press Enter:

How to find computer id windows 7How to find computer id

You’ll see the computer’s serial number displayed beneath the text “SerialNumber”. This command uses the Windows Management Instrumentation Command-line (WMIC) tool to pull the system’s serial number from its BIOS.

If you don’t see your PC’s serial number, blame your PC’s manufacturer. The number will only appear here if the PC manufacturer saved it to your computer’s BIOS or UEFI firmware. PC manufacturers don’t always fill in the number properly. In that case, you’ll see something like “0” or “To be filled by O.E.M.” instead of an actual serial number.

RELATED:How to Check Your Motherboard Model Number on Your Windows PC

This is also true if you built your own PC because the PC itself won’t have a serial number. However, you can look up the serial number of your motherboard and other components.

Check the BIOS

How To Find Computer Id Windows 7

You may also be able to find the serial number in the BIOS or UEFI firmware settings screen. This technique won’t get you a serial number if the wmic command didn’t, since the command pulls the serial number from the BIOS. However, checking the BIOS could be helpful if you can’t actually sign into Windows to run the wmic command.

RELATED:What Does a PC’s BIOS Do, and When Should I Use It?

Access the BIOS or UEFI firmware settings screen and look around for a “Serial Number” somewhere on a system information screen. It’ll be in a different place on different PCs, but you can usually find it somewhere on the “Main” or “System” screen.

Find the Serial Number On the PC’s Hardware, Box, or Elsewhere

If you don’t see a serial number after running the wmic command—or if you just can’t turn the PC on or don’t have access to it—there are several other places you might find the serial number:

  • If you have a laptop, flip it over. On some laptops, you’ll see the number on a sticker. On others, you’ll see the number printed directly on the metal or plastic the laptop is made from. If your laptop has a removable battery, the serial number is sometimes on a sticker inside the battery compartment, under the battery.
  • If you have a desktop PC, look at the back, top, or side of the case for some sort of sticker. The number may also be on a sticker inside the case, so you might have to open it up.
  • If you can’t find the serial number on the PC itself, look online for instructions specific to your model. The manufacturer’s website should tell you exactly where to look.
  • If you registered your PC with the manufacturer or received warranty service, the serial number should be included in the registration documentation, warranty service receipt, or email confirmation for the service.

How To Find Computer Id

  • If you still have the original product box, it usually has the serial number printed on it—often on the same sticker with the bar code.
  • If you purchased the PC online or in store, the serial number may be printed on the physical or email receipt you received.

And if you just can’t find your serial number at all, don’t give up hope. If you have proof of purchase, the manufacturer still may be able to help you with whatever service you need and may even be able to find out the serial number for you.

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This entry was posted on 13.09.2019.