Microsoft 748921-B21 Software Windows Server 2012 R.2 Standard ** The image may not match the actual product.
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Why 748921-B21 HP Microsoft Windows Server 2012 is the best?

Availability: In Stock
Part Number#: 748921-B21
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Short Description:
748921-B21 HP Microsoft Windows Server 2012 R.2 Standard 64-bit - License and Media - 2 Processor - OEM x DVD-ROM - PC - English, French, German, Italian, Spanish. New Bulk Pack

Interface Types of This Product: Operating System

Brand Warranty:
3 Years from the Manufacturer
Product Condition:
New Factory Sealed
Warranty provided by ALLHDD.COM:
30 Days
We are giving specifications below, why one should consider procuring HP Operating System Software features, a general overview, description, performance specification, relevant images, a competitive price infographic, and technical information about the 748921-B21 model with compatibility.

748921-B21 HP Microsoft Windows Server 2012 R.2 Standard 64-bit - License and Media - 2 Processor - OEM x DVD-ROM - PC - English, French, German, Italian, Spanish.

An operating system is a software that links the user and computer hardware and controls all other programs that run on the computer. An OS plays a vital role in memory, file, processor, and device management. The data transfer between input and output devices takes place through an operating system. You might not be able to use your computer as efficiently as you do with an OS installed when you don't have an OS.

What are Some Functions of an OS?

We may not be able to mention all that an OS does on your computer, but briefly, talk about a few of them.

Memory management

It is the work of an OS to manage your system's memory. Computer memory is just where data is stored as 0s and 1s and retrieved when needed. The OS keeps track of the memory usage, knowing which parts are in use and by which program. It also allocates and deallocates memory space to different programs. It decides on the memory capacity that each process uses.

Process management

This is sometimes referred to as process scheduling. Through the traffic controller program, an OS can track processes and all their status. It assigns process priorities to the CPU and flags any process that no longer requires the CPU.

Peripheral device management

Your computer system needs to communicate with peripheral devices, including IO, printers, scanners, etc. Through the I/O management program, the OS can determine the device that talks to the CPU and for how long. When the assigned time frame elapses, it is kicked out, and a new IO device gets connected.

File system management and other functions

A computer's file system is arranged into directories, which can have other directories or files. It is the role of an OS to know the location of the files and what data they are so that it can allocate and deallocate the computer resources as appropriate. Other key functions of an OS are ensuring security, detect and handle an error, monitor system performance, etc.

Types of Operating Systems

There are different operating systems in the market today. Windows operating system is the most popular with many applications in different industries. In this product category, we have two types of Windows operating systems.

You can choose either Windows Server 2012 or Windows 7 operating system, depending on the intended use. Note that all these products are genuine and come with licenses. You can also choose between a 32-bit or 64-bit Windows OS according to your personal preference. These products are also available in different languages such as English, French, German, Italian, and Spanish. So, you can make the right choice on what works best for you.

Why Buy An Operating System from ALLHDD

ALLHDD is a certified distributor that sells genuine products with vendor-approved licenses. You are also guaranteed timely delivery of your item and excellent customer support. Contact us for more details about our OS products.


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ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
Final Sale items are non-returnable/refundable in any situation. Any question? please ask our team before the shipment.

Important notes:

We can provide additional warranty service/support for any product you purchase from us if you need additional warranty coverage before finalizing the order from ALLHDD.Com. You need to ask in live chat/help or call us for more information.

Individual product warranty mentioned on each item product description page/detail page.

Free Technical support on purchased items, our expert consultancy over the phone, by email, by live chat, or by remote login.

Other Available Categories For - Software - Operating System


Shipping Options and Estimated Delivery Time

UPS Shipping Options:

FREE UPS® Ground (Free shipping to all orders for 48 states!)
Estimated delivery time: 4-7 business days

UPS 3 Day Select®
Estimated delivery time: 3 business days

UPS 2nd Day Air®
Estimated delivery time: 1-2 business days, Delivery by 10:30 AM or 2:00 PM

UPS Next Day Air® Standard Overnight
Estimated delivery time: Overnight 2-5 PM, Standard Overnight Delivery.

UPS Next Day Air® - Priority Overnight
Estimated delivery time: Overnight Delivery (Next Business Day) Delivery by 10:30 AM or 12:00 PM

UPS Next Day Air® First Overnight - Early A.M
Estimated delivery time: Overnight 8:00 AM, Early morning, overnight delivery for your time-critical shipments.

UPS® First Overnight - Saturday
Estimated delivery time: Overnight 8:30 AM – Saturday

FedEx Shipping Options:

FedEx Ground®
Estimated delivery time: (4–7 business days in the contiguous 48 states)
*For residential delivery via FedEx Ground use FedEx Home Delivery®
Estimated delivery time: 4−7 business days, based on the distance to the destination.

FedEx Express Saver®
Estimated delivery time: 3 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states (except Hawaii and Alaska)

FedEx 2Day®
Estimated delivery time: 2 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states

FedEx Standard Overnight®
Estimated delivery time: Next-business-day (by 4:30 PM to U.S. businesses and by 8:00 PM to residences)
Available throughout all 50 states (Hawaii is outbound only)

FedEx Priority Overnight®
Estimated delivery time: Next-business-day (by 10:30 PM to U.S. businesses, noon to most residences)
Available throughout all 50 states

FedEx First Overnight®
Estimated delivery time: Next-business-day (by 8:30 or 9 AM to most areas)
Available throughout all 50 states

Worldwide Shipping Options:

UPS®/FedEx® International Economy

Estimated delivery time: 4-7 business days

UPS®/FedEx® International Priority

Estimated delivery time: 2-4 business days

UPS®/FedEx® Ground Shipping Canada

Estimated delivery time: 5-8 business days

Important notes:

  • The processing of orders with Ground Shipping can take up to 24-48 hours. But we try to process all orders the same day.
  • We are not responsible for weather problems that may affect the delivery of goods by carriers. We cannot guarantee the exact delivery time, regardless of the carriers' claims.
  • If you have any specific delivery time requirements, please contact our customer support and someone from our customer service team will be able to help you.
  • You can estimate the shipping cost from the products detail page, also available on the checkout page
  • The shipping cost depends on box dimensions, weight, and zip/postal code
  • To get a FedEx® delivery service you need to mention it on the checkout page notebox.
  • For urgent shipments, please contact our customer service.
  • Shipping cut off 4:00 PM (Monday-Friday) and available blind drop shipment.