How about a really cost effective system for basic use, or you could upgrade it some if you wish.
160Gb hard drive upgrade just £11.75
Vista Premium £17.63 extra. You will need extra ram from elseware for Vista Premium.
Remember to reduce the warranty to minimum and buy via Quidco for further cashback savings.
305-D03C11a - £233.82 or less delivered
AMD® Sempron Processor 3400+
Genuine Windows Vista Home Basic - English
Dell 15" Value Flat Panel (E156FP) - UK/Irish
512MB DDR2 533MHz Memory
80GB (7200rpm) Serial ATA Hard Drive with 8MB DataBurst cache
48X CDRW/DVD-ROM combination Drive
Integrated nVidia® GeForce® 6150 LE graphics
Dell 2 Button USB Scroll Optical Mouse - Black
Integrated 7.1 Channel High Definition Audio
Microsoft® Works 8 - English