IMPORTANT UPDATE:  Microsoft no longer allows upgrade from Windows 7 to Windows 10 with the same Activation Key so please disregard the information below about how it's possible to Activate Windows 10 with the Activation Key of Windows 7. You will need to purchase a Windows Activation Key from Microsoft if you are upgrading from Windows 7. 
250 GB, 500 GB or 1 TB (Choose Above) HDD SATA Hard Drive for Dell Vostro 2520 2521 Laptop with Windows 10 Pro Installed UEFI Mode

IMPORTANT NOTE: Windows 10 PRO was installed on this Hard Drive in UEFI Mode. If your System has both UEFI and Legacy Mode, then make sure Boot Mode is set to UEFI mode otherwise your system will not detect the Operating System on this Hard Drive.

Compatible with Dell Vostro 2520 2521 Laptop

PLEASE READ BELOW BEFORE MAKING A PURCHASE

This hard drive has been cleaned, sanitized and formatted before a fresh install of Windows.

ACTIVATION:

This is a genuine version of Windows - not a pirated 'pre-activated' one.  Activation therefore may be required.- If your computer came with Windows 10 PRO pre-installed, then you don't need to do anything. Windows will automatically detect your system's digital license (which is embedded in the hardware) and activate.

Your system will also detect the Digital License Key and activate Windows if your computer came with Windows 8 Pro. 

If your computer came with Windows 7 PRO, then you will need to purchase a Windows 10 PRO Activation Key from Microsoft as Microsoft no longer allows Activation of Windows 10 PRO with a Windows 7 PRO Activation Key.

If none of the above situations matches your scenario, then you will need to buy Product Key for Windows 10 Pro.

Compatible with 99% of Laptop brands.

You are buying a HDD, with pre-installed Windows 10 Pro. This is ideal for new computer builds or to replace a dead or dying drive in an existing computer.

No technical knowledge is required. Simply install drive in Laptop, Power it on, let it automatically update devices for your hardware, and you're good to go!

This drive is suitable for any laptop model, that has a SATA connection pretty much any from the past 10-12 years. 

Note: 

The Dell Vostro 2520 Laptop Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive in the Internal Primary Bay and One 2.5" Solid State Drive or Hard Drive in the Dell Removable Modular Bay) Note: The second 2.5" Drive is optional and is located in the optical drive bay when installed. If replacing the optical drive for a second 2.5" Drive, you will need the Dell Removable Modular Bay Carrier for installation.

The Dell Vostro 2521 Laptop Supports Single and Dual Drive Configurations. (One 2.5" Solid State Drive or Hard Drive in the Internal Primary Bay and One 2.5" Solid State Drive or Hard Drive in the Dell Removable Modular Bay) Note: The second 2.5" Drive is optional and is located in the optical drive bay when installed. If replacing the optical drive for a second 2.5" Drive, you will need the Dell Removable Modular Bay Carrier for installation.

About this Drive: No drivers have been installed for a specific model. Windows will install most drivers on the first boot. You can then install additional drivers by running Windows update. If some drivers are still missing you can update them from the laptop manufacturer's support website. Please note that we are not selling any software and that Windows 10 Pro has been preinstalled for your convenience. It has not been activated. The buyer must have a Microsoft digital license or product key for Windows 10 Pro. If Windows is not activated within 1 month, some features will no longer work.

The buyer must have a Microsoft digital license or product key for the exact version of Windows 10 installed (in this case Windows 10 Pro). These drives are for people who purchased a desktop with no hard drive, or whose hard drives have crashed and do not have the Windows media to reinstall the operating system, or who want to upgrade to a Drive with Windows 10 Pro. A license or key for any other version of Windows 10 will not validate Windows 10 Pro. If you don't own Windows 10 Pro, but want to upgrade to it, you can purchase a key from Microsoft.

Digital Windows 10 Licenses/Embedded License

A digital license is a virtual product key. If you previously upgraded from an older version of Windows to Windows 10, you have what is known as a digital or embedded license. That means the Microsoft servers already know you have a Windows 10 license for that desktop, which is linked to serial numbers of several pieces of hardware they identified in your desktop and it will be automatically validated by Microsoft without you putting in an actual product key. While you do not need a physical product key in this case, you do need to know if you own Windows 10 Pro or Windows 10 Home as the installed version on the hard drive must match the version you own.

Returns:

As with all our items we have a 60 day return policy. Item must be in original condition for a full refund. Depending on the item condition upon return, we reserve the right to decide whether to issue a full or partial refund.

Shipping:

Shipping is via USPS 1st Class Mail or Priority depending on the Order Size. While may show you an estimated delivery date, this is not guaranteed as USPS has no guaranteed delivery times for 1st Class Mail. We will ship within 1 business day of purchase, after that we have no control over delivery. If you need your hard drive faster, then choose the Priority mail option. USPS Priority Mail which has 2-3 day delivery times depending how far you are from CA.