The IBM ThinkCentre M-Series computers (and A-series) were introduced in 2003. In 2005, Chinese computer manufacturing giant Lenovo completed their financial acquisition of IBM's Personal Computing Division. Along with the Thinkpad, M Series computers are still being produced and sold on Lenovo's site.

Discontinued (Lenovo) IBM ThinkCentre M-Series computers include:

1. ThinkCentre M50
2. ThinkCentre M51
3. ThinkCentre M52
4. ThinkCentre M55, M55e, M55p (tower) – Note that, while this Lenovo/IBM ThinkCentre M Series model's production has been discontinued, new products are currently available for purchase under warranty

Available Lenovo ThinkCentre M Series desktop computer models include:

1. ThinkCentre M57
2. ThinkCentre M57e
3. ThinkCentre M57p

IBM ThinkCentre M-Series product features include:

1. ThinkVantage Technologies offers easy system management particularly for IT managers
2. Extra security protections include encryption keys, electronic credentials and a fingerprint reader keyboard
3. Compatible with Computrace asset tracking technology
4. Dual Independent Screen Support allows viewing up to four screens simultaneously
5. Available in tower, small desktop and ultra small desktop sizes
6. Energy efficient Lenovo/IBM ThinkCentre M Series models in line with Energy Star standards

Action Steps
The best contacts and resources to help you get it done

Find general product information about IBM ThinkCentre M-Series computer models

Determine if you want to buy a new Lenovo ThinkCentre M-Series computer model or keep the old one.

I recommend: Read about available and discontinued IBM ThinkCentre M-Series computer models. Along with the Thinkpad, M Series computers can be seen in action at the manufacturer Lenovo website.

Explore the product features of available IBM ThinkCentre M-Series computer models

Is it worth upgrading to the latest IBM M-Series computers?

I recommend: Find out more about the general features of the Lenovo M Series computers at the Lenovo website. Read a PC Magazine review of the Lenovo M Series model ThinkCentre M57p eco, an available ThinkCentre M Series high-end model. See all the currently available ThinkCentre M Series computers at the Lenovo online store. Even though Lenovo has stopped production of the IBM ThinkCentre M55 models, they're currently under warranty and for sale at major online computer retailer CDW.

Find out where to buy pre-owned IBM ThinkCentre M-Series computer models

If you would like to buy a discontinued and unavailable IBM ThinkCentre M-Series computer model, you may be able to find some pre-owned refurbished ones. Buying a discontinued IBM ThinkCentre M-Series computer models may present a challenge, because they are hard to find.

I recommend: Find out how to pre-order a used product such as a discontinued IBM ThinkCentre M-Series computer model at Amazon Marketplace. If you don't know how to bid for products on eBay, such as ThinkCentre M-Series computer models, the eBay offers an easy-to-understand tutorial.

Get product support for both available and discontinued models

While there's much product support information available for discontinued IBM ThinkCentre M-Series computer models, most is of the self-help variety.

I recommend: You can download drivers for available and discontinued IBM ThinkCentre M-Series computer models at the Lenovo webpage. Lenovo also has an active user's forum for A and M Series ThinkCentre Desktops. If the forum doesn't answer your tech support questions, there's also an in-depth and searchable knowledgebase for all Lenovo desktop products. If you prefer to repair your ThinkCentre computer yourself, Lenovo offers a series of DIY videos. If these options don't answer your concerns, you can submit a service request to IBM or speak to a Lenovo support representative by phone.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Buyers should use caution when buying a refurbished IBM ThinkCentre M series computer.