The simplest way to find a laptop's model number and serial number is the label on the underside. If the label has worn off, Windows shows the model in System Information (press the Windows key and R, type msinfo32 and press Enter), and the serial number can be read from the BIOS or from a PowerShell command. On a MacBook, open the Apple menu and choose About This Mac. Write the details down before you order a part, check a warranty or ask for a repair quote.
Parts, drivers, warranty checks and repair quotes all depend on the exact model, and "an HP laptop" or "a Dell with a 15-inch screen" is not enough. Batteries, screens, keyboards and memory are specific to one model or one small family. This guide shows where each detail lives, how to read it on the six common brands and what to note down.
Why the exact model matters
- Parts fit one model. A battery or a keyboard made for one version of a laptop often will not fit the next version, even when the two look the same.
- Warranty is checked by serial number. Most makers' support sites ask for it.
- Drivers and BIOS updates are listed by model. The wrong file can cause problems, not fix them.
- A repair quote is only as accurate as the model behind it. The same fault can cost differently on two laptops from one maker.
Step one: read the label
Turn the laptop over. Most makers print a label or an engraving on the base with the model name, the model number and the serial number. The marketing name, such as "Inspiron" or "Pavilion", is the series. The model number is the longer code that tells one version from another. They are not the same thing, and a shop needs the code.
Take a clear photo of the label and keep it with your invoice. If the printing has rubbed off, use the methods below. Some older laptops with a removable battery also have a sticker in the battery bay.
Step two: find it in Windows
- Settings. Open Settings, then System, then About. It lists the device name, the processor, the installed memory and the Windows edition and version.
- System Information. Press the Windows key and R, type msinfo32 and press Enter. Read the System Manufacturer, System Model, processor, BIOS version and installed memory. The System Model line is often the model number.
- DirectX Diagnostic Tool. Press the Windows key and R, type dxdiag and press Enter. The first tab shows the system model, and the Display tab shows the graphics chip.
- Task Manager. Press Ctrl, Shift and Esc, open the Performance tab and choose Memory. It shows the memory speed, how many slots are used and the form factor. The Disk entry shows whether the drive is an SSD or a hard disk.
- PowerShell. Open PowerShell and type Get-CimInstance Win32_BIOS. The SerialNumber line is the serial number. If it shows a placeholder such as "To be filled by O.E.M." or "Default string", use the label or the invoice instead. Type Get-CimInstance Win32_ComputerSystem to see the model.
Step three: brand by brand
| Brand | Where to look | Good to know |
|---|---|---|
| Dell | Label on the base, BIOS screen, or the SupportAssist app | The serial number is called the Service Tag |
| HP | Label on the base, or press Fn and Esc on many models to open a system information window | HP lists a serial number and a separate product number, and support pages often ask for both |
| Lenovo | Label on the base, the BIOS, or the Lenovo Vantage app | Lenovo support pages work from the serial number |
| Acer | Label on the base, or the Acer Care Center app | Quote the full model code, not only the series such as Aspire or Nitro |
| Asus | Label on the base, or the MyASUS app | The model code is a short string of letters and digits |
| MSI | Label on the base, or the MSI Center app | The label often carries an MS- code in addition to the marketing name |
These are the usual places and they differ between models. If one does not work, another will. The BIOS screen is the dependable fallback, and our guide to opening the BIOS on Dell, HP, Lenovo, Acer, Asus and MSI laptops shows how to reach it.
On a MacBook or iMac
Open the Apple menu and choose About This Mac. It shows the model name, the year and the serial number, and System Report gives more detail. The serial number is also printed on the underside of a MacBook. Apple's own coverage check takes the serial number, and the model year decides which parts fit.
What to write down before you ask for a part or a quote
- Brand, series and the full model number
- Serial number
- Processor, memory size and type, and storage size and type
- The Windows version, shown on the About page
- Any upgrade done since you bought it, such as extra memory or a new SSD
- The fault, in plain words, and when it began
With these to hand a technician can check the part, the likely cause and what a fix involves before you leave home. It also makes a quote easier to compare, as we explain in our guide to reading a repair quote.
Mistakes that lead to the wrong part
- Using the series name instead of the model number
- Reading the model from the box, which may be for a different configuration
- Assuming two laptops of the same year share parts
- Ordering memory by size only, without checking the type your laptop uses
- Skipping the serial number, which is what tells a warranty page which version you own
Where this helps next
Once you have the model, you can check the warranty on the maker's site and decide whether to use the brand or an independent shop. Our guide to a service centre or an independent repair shop sets out how. If you are planning an upgrade, the model tells you how many slots there are, and the guides on upgrading RAM and SSD upgrades pick up from there.
If you would like us to check a part against your model, give the details to any branch by call or WhatsApp. The inspection costs ₹350 and is credited to the bill if you go ahead, and the repair carries a 90-day warranty. Start with laptop repair near me to find the nearest branch.
Frequently asked questions
Is the model number the same as the serial number?
No. The model number identifies the version of the laptop, and many units share it. The serial number is unique to your laptop.
Can I find the model if the laptop will not turn on?
Yes. Use the label on the base, the box or the purchase invoice. Many online purchases also show the full model in the order details.
Why does the repair shop ask for the serial number?
It lets them check the warranty status and the exact build of your laptop. Asking before quoting avoids ordering the wrong part.
Does the model number change when I upgrade the RAM or SSD?
No. The model stays the same. It is worth noting the upgrade, though, because it changes what the laptop contains.
