This doc explains how to find the service tag number on your Windows computer whether it is on or off.

Ho un pc tipo quelli da banco, e' un HP RP7 7800 All'avvio il post mi da' un errore Invalid Electronic Serial Number Obbligando a premere F1 per proseguire col boot Ho letto sul manuale del pc specifico e dice che bisogna entrare nel setup e metterci un 'electronic serial number'. You will need to find someone with access to HP utilities such as a certified service provider. The utility for setting model and serial number used to be called snzero and was used to set these.

An Acer serial number is a 7 or 22 character string containing letters and numbers.

If Your Computer Turns On

1. Open up the command prompt window on your computer. You can do this by searching for 'cmd' or right clicking on the windows home icon in the bottom left corner of the screen.
2. In the command window type in 'wmic bios get serialnumber'. The serial number will then be displayed.

Invalid Electronic Serial Number Hp 7800 Officejet

If Your Computer Doesn't Turn On

Acer serial numbers may be located in one of these locations.

• The sticker on the base of the computer directly below the barcode after 'S/N'.
• For desktop models, the sticker located on the side of the machine near the bottom directly after 'S/N:'.

An Asus serial number is a 10, 12, or 15 character string containing letters and numbers. All Asus serial numbers can be found on the original packaging also.

If Your Computer Turns On

1. Open up the command prompt window on your computer. You can do this by searching for 'cmd' or right clicking on the windows home icon in the bottom left corner of the screen.
2. In the command window type in 'wmic bios get serialnumber'. The serial number will then be displayed.

If Your Computer Doesn't Turn On

Asus serial numbers may be located in one of these locations.

• The sticker on the base of the computer directly below the barcode after 'SN:'.
• For desktop models, the sticker located near the ports on the back of the machine after 'SN:'.

A Dell service tag is a 7 character string containing numbers and letters. All dell service tags can be found on the packaging as well.

If Your Computer Turns On

1. Open up the command prompt window on your computer. You can do this by searching for 'cmd' or right clicking on the windows home icon in the bottom left corner of the screen.
2. In the command window type in 'wmic bios get serialnumber'. The serial number will then be displayed.

If Your Computer Doesn't Turn On

• If the command window can't be accessed, or the computer doesn't turn on, Dell Laptops also have the serial number printed on the laptop. Newer Dells like the XPS models have a flap on the bottom that can be lifted up to reveal the serial number.
• If there is no flap, the serial number is still printed somewhere on the bottom case identified by the white sticker and bar code.
• On Desktop models, the Serial Number sticker is usually placed either on top of the machine, or on the back by the ports (see below).

A HP serial number is a 10 or 12 character string containing letters and numbers.

If Your Computer Turns On

Invalid Electronic Serial Number Hp 7800 Officejet

1. Open up the command prompt window on your computer. You can do this by searching for 'cmd' or right clicking on the windows home icon in the bottom left corner of the screen.
2. In the command window type in 'wmic bios get serialnumber'. The serial number will then be displayed.

If Your Computer Doesn't Turn On

Invalid Electronic Serial Number Hp

Zip password tool 2.3 serial key. HP serial numbers may be located in one of these locations.

• On the bottom or back edge of the laptop.
• If the battery is removable, inside the battery compartment.
• If the laptop separates into a tablet, on the edge where the tablet connects to the keyboard.
• For Desktops, the serial number is found on the side of the desktop.
• For 'all in one' models, the serial number is either located on the back of the screen or under the base.

A Lenovo serial number is a 7 character string containing letters and numbers.

If Your Computer Turns On

1. Open up the command prompt window on your computer. You can do this by searching for 'cmd' or right clicking on the windows home icon in the bottom left corner of the screen.
2. In the command window type in 'wmic bios get serialnumber'. The serial number will then be displayed.
3. If the command prompt doesn't work, go to Lenovo Support and click on 'Detect My Product'.

If Your Computer Doesn't Turn On

Lenovo serial numbers can be found in the following locations.

• The sticker on the base/bottom of the computer.
• For desktop models, the sticker located near the ports on the back of the machine.

A Microsoft serial number is a 12 digit string containing only numbers. All Microsoft serial numbers can be found on the original packaging as well.

If Your Computer Turns On

1. All surface devices should have the 'Surface' app installed. Open the surface app.
2. Click on the 'Feedback' button on the left side.
3. Under 'Your Surface Device' you will see your serial number listed.

If Your Computer Doesn't Turn On

Invalid Electronic Serial Number Hp 7800 Printer

• For Surface Pro models, and the Surface 3 Open the kickstand and look for the string of numbers near the base.
• For the Surface Book The serial number is located on the bottom edge of the clipboard where it attaches to the keyboard. It is also located on the bottom of the keyboard next to the rubber foot.
• For the Surface Studio The serial number is located on the bottom of the base.

A Toshiba serial number is a 9 or 10 character string containing letters and numbers.

If Your Computer Turns On

1. Open up the command prompt window on your computer. You can do this by searching for 'cmd' or right clicking on the windows home icon in the bottom left corner of the screen.
2. In the command window type in 'wmic bios get serialnumber'. The serial number will then be displayed.
3. If the command prompt doesn't work, click here to download the TOSHIBA Product Information utility to retrieve your serial number.

If Your Computer Doesn't Turn On

• Toshiba laptops have the serial number either printed on a sticker located on the bottom of the laptop, or laser etched into the bottom case directly.