I am looking for a PC for the following purposes:

General internet, ipod, and office related tasks
Have the potential to add an additional monitor in the future
Play games such as Football Manager
Connect the PC to my TV – so I can stream BBC iplayer and with the aid of wireless mouse/keyboard use the internet and computer in the next room

I have no idea as to what processor, memory and graphics card I would need. Is there anything else I need

help please

Your requirements aren't that strenuous - with the exception of tv quality output.

If you have absolutely no idea, then you're best off going with something like a Dell (www.dell.co.uk) and buying whatever you can afford.

What is your budget and I can talk you through some of the options on the parts list.

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just buy online any p4 specs but must dual core 2.2 or 2.5