The minimum hardware requirements for Windows XP Professional include:
* Pentium 233-megahertz (MHz) processor or faster (300 MHz is recommended)
* At least 64 megabytes (MB) of RAM (128 MB is recommended)
* At least 1.5 gigabytes (GB) of available space on the hard disk
* CD-ROM or DVD-ROM drive
* Keyboard and a Microsoft Mouse or some other compatible pointing device
* Video adapter and monitor with Super VGA (800 x 600) or higher resolution
* Sound card
* Speakers or headphones
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Above taken from Microsoft.
What is missing from the above is the personal needs of the system installer person.
A recommend list is:
1.) One medium Pizza with extra cheese.
2.) Two large bottles of Coca Cola.
Of course, you needs may vary.