Microsoft Windows 10 Professional OEM Key

What is included in Microsoft Windows 10 Pro Upgrade?

Edition core – Full Windows 10 Pro feature set after upgrade.
BitLocker encryption – Full BitLocker Drive Encryption for internal and removable drives.
Hyper-V virtualization – Native Hyper-V for running virtual machines locally.
Remote Desktop host – Acts as RDP server, not only as client.
Domain join – Local Active Directory and Microsoft Entra ID join supported.
Core Capacity – Supports up to 2 TB RAM and 2 CPU sockets.

What are the main benefits of Microsoft Windows 10 Pro Upgrade?

The upgrade lifts an existing Windows 10 Home installation to Windows 10 Pro and unlocks the business-grade features that the Home edition does not include. It keeps installed programs, files, and user accounts in place, so no clean reinstall of applications is needed.

In-place upgrade – Keeps installed apps, files, and user profiles intact.
Business features – Adds BitLocker, Hyper-V, RDP host, domain join.
Group Policy – Enables local Group Policy Editor for fine control.
Update control – Windows Update for Business defers feature updates.
Sandbox isolation – Windows Sandbox runs untrusted apps in throwaway VM.
Assigned Access – Locks a device to a single kiosk application.

What does the Windows 10 Pro Upgrade actually change on my PC?

It converts the existing Windows 10 Home edition into Windows 10 Pro without reinstalling the operating system. The change is applied through Settings, Activation, Change product key, which switches the SKU and turns on the Pro-only components already present on disk. Installed software, documents, and user accounts remain in place, and Hyper-V plus the Group Policy Editor become available after a restart. The upgrade does not move Windows 7, Windows 8.1, or Windows 11 systems to Windows 10 Pro.

What Windows 10 end of support means
Background on the Windows 10 lifecycle, security updates, and what changes after support ends.

Who is Windows 10 Pro Upgrade best suited for?

It is aimed at users running Windows 10 Home who need at least one Pro-only capability, typically full BitLocker for encrypted laptops, Hyper-V for test VMs, or Remote Desktop host so the machine can be accessed from outside. Home administrators with a small office network also use it to join a workstation to a local Active Directory or Microsoft Entra ID tenant, which Home does not allow. Users who only browse, use Office, and stream video gain little from the upgrade. The deciding question is whether the missing Home features are actually needed for daily work.

How does Windows 10 Pro compare to Windows 10 Home?

Pro adds the business features that Home omits: full BitLocker Drive Encryption, Hyper-V, Remote Desktop hosting, local Group Policy Editor, Active Directory and Microsoft Entra ID join, Windows Update for Business, and Assigned Access. Home only offers device encryption on supported hardware and can act as an RDP client, not an RDP host. The maximum supported RAM also rises from 128 GB on Home to 2 TB on Pro. Everything else, including the user interface, Microsoft Store, and Windows Defender, behaves the same.

Does Windows 10 Pro Upgrade include full BitLocker, Hyper-V, and Remote Desktop hosting?

Yes, all three are unlocked once the upgrade completes. Full BitLocker Drive Encryption can be enabled on the system drive, fixed data drives, and removable drives via BitLocker To Go, with recovery keys stored in a Microsoft account, Active Directory, or a printed file. Hyper-V is available as a Windows feature after the upgrade and supports running Windows or Linux guests, provided the CPU offers SLAT and virtualization is enabled in firmware. The machine can also accept incoming Remote Desktop sessions, which Home blocks entirely.

What should users check before choosing the Windows 10 Pro Upgrade?

The current installation must be a genuine Windows 10 Home edition; the upgrade path does not apply to Windows 7, Windows 8.1, or Windows 11. Mainstream Windows 10 support ended on 14 October 2025, so the upgrade is mainly useful when the hardware cannot run Windows 11 or when Windows 10 Pro is required for a defined business reason such as BitLocker or RDP hosting. Hardware that meets the Windows 11 requirements, including TPM 2.0 and Secure Boot, is usually better served by moving to Windows 11 Pro instead. Customers who need extended security updates beyond October 2025 should also confirm whether their device qualifies for the ESU program.

What Windows 10 users should know about support ending
Details on the Windows 10 support end date, ESU options, and how some users can stay covered until October 2026.

Should I upgrade to Windows 10 Pro or move directly to Windows 11 Pro?

If the hardware meets the Windows 11 requirements, especially TPM 2.0 and Secure Boot, Windows 11 Pro is the longer-term choice because Windows 10 reached end of mainstream support on 14 October 2025. The Windows 10 Pro Upgrade is the better option when the device does not meet the Windows 11 hardware requirements, when a specific application is certified only on Windows 10, or when an existing Windows 10 Home installation needs Pro features immediately without changing the major version. The Pro features themselves, such as BitLocker and Hyper-V, work the same way on both releases.

Windows 11 advantages and disadvantages explained
Overview of the main improvements, hardware requirements, and trade-offs to weigh before moving from Windows 10 to Windows 11.

Frequently asked questions about Microsoft Windows 10 Pro Upgrade

Does the upgrade require a clean reinstall of Windows?

No. The change from Home to Pro is an in-place edition switch through Settings, Update & Security, Activation. Installed applications, files, and user accounts stay in place, and only a restart is needed to finalize the Pro components.

Is a Microsoft Account required to use Windows 10 Pro?

No. Windows 10 Pro setup still allows a local user account during installation, unlike newer Windows 11 Home builds. A Microsoft Account is only needed for features such as OneDrive, Microsoft Store apps, and storing a BitLocker recovery key in the cloud.

Can Windows 10 Pro join both local Active Directory and Microsoft Entra ID?

Yes. Windows 10 Pro supports joining a local on-premises Active Directory domain and joining Microsoft Entra ID (formerly Azure AD), including hybrid join. This is one of the core differences from Windows 10 Home, which cannot perform either type of domain join.

Does Windows 10 Pro still receive security updates?

Mainstream support for Windows 10, including the Pro edition, ended on 14 October 2025. Extended Security Updates (ESU) are available as a paid option for eligible devices and deliver critical and important security fixes for a limited time after that date, but no new features or non-security fixes are included.

Legal Information About Our Products

keys.express and keys.discount are online platforms for product keys. The product keys available in our shops for Windows and other software are inexpensive, secure, legal and come with an activation guarantee.

Below you will find the most important legal information about our products.

Unused and Non-Activated Product Keys

We offer exclusively unused and non-activated product keys. The keys have never been redeemed for activation and are fully available to the purchaser for the first-time activation of the respective product. A key that has already been redeemed could no longer be used for a new activation and is therefore not offered by us.

Trading in these product keys is permissible in the European Union and in Switzerland under current case law, provided that the necessary conditions are met. These conditions are as follows:

• The software must originally have been placed on the market with the consent of the rightholder within the territory of the EU, another contracting state of the EEA, or Switzerland by way of sale.
• The license for the software must have been granted in return for the payment of a fee intended to enable the rightholder to obtain remuneration corresponding to the economic value of the copy of the software.
• The rightholder must have granted the first acquirer the right to use the software permanently (for an unlimited period).
• Any improvements and updates that the subsequently downloaded computer program has compared to the originally downloaded one must be covered by a maintenance agreement concluded between the rightholder and the first acquirer.
• The original licensee must have made their own copies unusable.

This trade is legally permissible because the underlying license was already placed on the market with the consent of the rightholder within the EU/EEA or Switzerland in return for appropriate remuneration. As a result, the so-called principle of exhaustion has taken effect, which permits the resale of individual product keys — in particular those originating from volume license agreements. Microsoft or the respective software provider has already received appropriate remuneration for this.

keys.express and keys.discount ensure that the aforementioned conditions are met and that the lawful use of the software is guaranteed. The requirements arising from European legislation are also observed in Switzerland.

Important note: The acquisition of a product key through the transmission of a combination of numbers and letters in digital form does not, in itself, constitute a license for the lawful use of the program. The license only arises from the respective installation and the associated acceptance of the manufacturer's terms of use.

Further information can be found here:

• Legal assessment by Swiss lawyers

Overview of the Most Important Legal Information

• We offer unused, non-activated product keys for the activation of the respective computer programs. The key alone is not yet a license.
• The license only arises from the respective installation and the resulting acceptance of the terms of use. These terms of use govern the right to use the software between you and the respective manufacturer.
• The principle of exhaustion has, as a rule, taken effect — i.e. the license is "used up" — as soon as it was lawfully placed on the market for the first time. The products concerned are software placed on the market for unlimited-time use in the form of an activatable product key with the option to download the program. Microsoft or the respective software provider has received appropriate remuneration for this.
• You gain access to particularly attractively priced product keys from volume license agreements, which are to be treated legally in the same way as parts of volume licenses upon first acquisition.
• The software itself is always the same original software that is also obtained through official download channels or manufacturer sources. You are therefore not paying for a different or inferior version, but for a valid activation key or a corresponding license.
• All brand names and brand logos are registered trademarks, whose use here serves solely for product description — the ownership rights lie with the respective trademark holder.