Check Your Computer's Age in Windows or Mac Settings

The fastest way to find your computer's age is through the system information built into your operating system. Windows and Mac both store the date your computer was manufactured, and you can reach this information in under a minute without installing anything.

On Windows, right-click the Start button, select "System," and scroll down to "Device specifications." Look for "System firmware last updated" — this shows when your computer's core software was installed at the factory. For a more detailed manufacturing date, press Windows key + R, type msinfo32, and press Enter. In the System Information window, find "System Boot Time" and "Original Install Date" in the list. The original install date is closest to when the computer left the factory.

On Mac, click the Apple menu in the top-left corner, select "About This Mac," and go to the "System Report" button. In the window that opens, select "Hardware" on the left side. Look for "Hardware UUID" and the date listed under "Serial Number Details" — Apple's support website can decode your serial number to show the exact manufacturing week and year.

Key Takeaways

  • Windows computers show their original install date in System Information (msinfo32), which is set at the factory and rarely changes.
  • Mac computers display manufacturing information through the System Report, accessible from "About This Mac" in the Apple menu.
  • Your computer's age is measured from the factory date, not from when you bought it — a refurbished or returned machine may be older than you think.
  • If your computer has been reinstalled or reset, the original install date may no longer be accurate, and you will need to check the serial number instead.
  • The BIOS or firmware date on Windows shows when the system was last updated, not necessarily when it was made — check the original install date for true age.

Use Your Serial Number to Verify Manufacturing Date

If your system information has been reset or you do not trust the dates shown in settings, your serial number is the most reliable source. Every computer has a unique serial number printed on the bottom or back of the case, and manufacturers encode the manufacturing date into this number.

Write down your serial number exactly as it appears. On Windows, you can find it by opening Command Prompt (press Windows key + R, type cmd, and press Enter), then typing wmic bios get serialnumber. On Mac, the serial number appears in "About This Mac" under "System Report."

Once you have the serial number, visit the manufacturer's support website — Dell, HP, Lenovo, Apple, Asus, or whoever made your computer. Most manufacturers have a serial number lookup tool where you enter the number and receive the exact manufacturing date, warranty expiration, and sometimes the original configuration. If the manufacturer does not have an online tool, call their support line with your serial number and they will tell you the date.

Check the Physical Label on Your Computer

Look at the bottom or back of your computer case for a label with manufacturing information. This label usually includes the serial number, model number, and sometimes a date code that shows when the computer was assembled.

The date format varies by manufacturer. Some use a straightforward month and year (like "03/2019"), while others use a week code where the first two digits are the week number and the last two are the year (so "1520" means week 15 of 2020). Dell, HP, and Lenovo typically print the manufacturing date directly on the label. Apple does not print a date on the label but encodes it in the serial number.

If the label is worn or unreadable, take a photo with your phone's flashlight to brighten it, or gently clean the label with a dry cloth. Do not use water or solvents — you risk damaging the label further or the computer itself.

Look at Your Purchase Receipt or Warranty Card

If you still have the original paperwork from when you bought the computer, the purchase date gives you a close estimate of the computer's age. Most computers are manufactured within one to three months before they are sold, so a purchase date from 2019 means the computer was likely made in late 2018 or early 2019.

Check your email for a receipt if you bought the computer online — search your inbox for the retailer's name or the computer model number. If you bought it in a store, the receipt may be in a drawer or filing cabinet. Some retailers also keep purchase history in your online account if you used a loyalty card or logged in during checkout.

The warranty card or documentation that came in the box sometimes includes a manufacturing date separate from the purchase date. This is more precise than the purchase date alone, especially if the computer sat in a warehouse or store for several months before you bought it.

Understand What "Age" Means for Your Computer

A computer's age is measured from the date it was manufactured at the factory, not from when you bought it or first turned it on. A refurbished computer, a returned item, or a display model in a store may be one or two years old even though you just purchased it. This matters because older computers may have outdated components, less remaining warranty coverage, or parts that are closer to failure.

The manufacturing date also affects how long your computer will receive software updates. Windows 10 and Windows 11 have specific end-of-support dates, and older computers may be running versions that are no longer receiving security patches. Similarly, Mac computers older than about seven to ten years may not run the latest operating system, which can limit your ability to install new software.

If you are considering buying a used computer, always check the manufacturing date before you decide. A computer that is five years old is significantly different from one that is two years old in terms of remaining lifespan and performance.

What to Do If You Cannot Find the Manufacturing Date

If your computer is very old, the label may be illegible, or the serial number lookup tool may no longer work. In this case, you can estimate the age by looking at the model number and checking when that model was released.

Search for your computer's exact model number on the manufacturer's website or on tech review sites like TechSpecs or NotebookCheck. These sites list the release date for each model, which tells you the earliest the computer could have been made. If your model was released in 2015, your computer is at least that old, though it could be newer.

You can also check the Windows or Mac version your computer originally shipped with. Older versions of Windows (like Windows 7 or Vista) or older versions of macOS (like El Capitan or Sierra) indicate a computer from a specific era. Cross-reference the operating system version with the year it was released to narrow down your computer's age.

Frequently Asked Questions

Does resetting my computer change the original install date?

Yes. If you reset Windows to factory settings or erase and reinstall macOS, the original install date resets to the date you performed the reset. When this happens, check your serial number instead — the manufacturer's date code is permanent and cannot be changed by resetting the computer.

Why does my computer show a different age in different places?

Different dates in your system information reflect different events: the original install date is when the computer left the factory, the firmware date is when the system software was last updated, and the boot time is when you last turned it on. The original install date is the true manufacturing date.

Can I find out how old my computer is if I do not have the original box or paperwork?

Yes. The serial number lookup on the manufacturer's website works without any original documentation — you only need the serial number, which is printed on the computer itself. If the label is damaged, you can also retrieve the serial number through Windows Command Prompt or Mac System Report.

Is a computer that is five years old too old to use?

Not necessarily. A five-year-old computer can still work well if it has been maintained and has adequate storage and memory. However, it may not run the latest software, may receive fewer security updates, and may have components closer to failure. Check whether your computer still receives operating system updates before deciding.

What if the manufacturer's serial number lookup tool does not work?

Call the manufacturer's support line with your serial number — they maintain records longer than their online tools and can tell you the manufacturing date over the phone. If the manufacturer is no longer in business, try tech forums or Reddit communities dedicated to that brand, where experienced users can sometimes decode older serial number formats.