NEED HELP! Can someone please check compatibility

Boxed CPU's come with the retail HSF. If you dont do any gaming they intergrated graphics will suit you fine. Kingston RAM tends to work in every system so you shouldn't have complication there.

You could however build a i3-2120 and a H67 chipset if you want better performance as these new processes just came out.

I am unable to open the link with the desktop and the PSU. Typically built in PSU's are rather poor in quality.

Thanks a lot, i will look into that. I will buy a psu seperately aswell.
If the psu was to fail, would any of the components inside be damaged?
If so, could you recommend a decent PSU manufacturer

http://www.ebuyer.com/product/114928 £28.61 inc. vat
Antec Basiq Power 350W ATX 12V PSU

When PSU's fail they usually take something with them. When my built in PSU failed it took the motherboard with it, in total new PSU+mobo was around 300

ebuyer.com

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Intel Core i3 540 3.06GHz Socket 1156 4MB L3 Cache Retail Box Processor 185939 180 in stock £89.99 £74.99 £89.99 £74.99

Asus P7H55-M LX H55 Socket 1156 DVI VGA Out 8 Channel Audio MATX Motherboard 235728 33 in stock £55.98 £46.65 £55.98 £46.65

Western Digital WD5000AAKS 500GB SATAII 7200RPM 16MB Cache - OEM Caviar Blue 124228 > 5 in stock £30.80 £25.66 £30.80 £25.66

Antec 380W EarthWatts Green PSU - 80plus Bronze Certified 185183 4 in stock £36.80 £30.66 £36.80 £30.66

Kingston 4GB (2x2GB) DDR3 1333MHz i5 Memory Kit CL9 1.5V 158711 38 in stock £31.23 £26.02 £31.23 £26.02

Cart total inc vat: Cart total ex vat: £244.80
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You still have to pick out a dvdrw drive & standard atx tower/desktop case. If you list the software/games you're building this pc for, I can fine-tune the specs.

Thanks a lot. Okay here is what I have come up with so far....

Intel Core i3 540 3.06GHz Socket 1156 4MB L3 Cache Retail Box Processor 185939 168 in stock £89.99 £89.99

ASUS P7H55-M H55 Socket 1156 VGA HDMI Out 8 Channel Audio MATX Motherboard 200985 36 in stock £64.20 £64.20

Western Digital WD5000AAKS 500GB SATAII 7200RPM 16MB Cache - OEM Caviar Blue 124228 > 5 in stock £30.80 £30.80

Kingston 4GB (2x2GB) DDR3 1333MHz i5 Memory Kit CL9 1.5V 158711 23 in stock £34.98 £34.98

LiteOn IHAS124-19 24x DVD±RW DL & RAM SATA Optical Drive - OEM Black with Nero Essentials 176026 > 200 in stock £11.99 £11.99

Tenda Wireless-G PCI Adapter 132449 150 in stock £8.49 £8.49

Antec NSK 3480 MATX Micro Tower - With 380W EarthWatts PSU ATX12V 2.2 USB/FireWire/Audio 130946 10 in stock £77.92 £77.92

Cart total inc vat: £318.37

The case comes with 1x120mm fan, which i'm thinking will be sufficient. I picked a Micro ATX case because its for my mom and she wants something small. I'm assuming that will have enough room?
It will be used for the web, office applications, itunes, watching videos (not hd), and she will probably want norton installed. Reliability and long-lasting is what i'm aiming for.
I was originally going to get the WD Caviar Black HDD because I somehow thought it would be more reliable. Is the Caviar Blue just as good?

I forgot to ask, why is the i3-530 (2.93) more expensive than the i3-540 (3.06)?

Your list looks great. That's a very solid case with a quality EarthWatts psu. Both the case & mobo are mATX. Yes, it's enough room.

The Intel graphics can play HD smoothly, in case she will watch full screen HD (youtube).

Blue is slower than Black. Both are good. Black is the warmest. I'd stay away from Green which is the slowest of the pack, but may be what green people want. The other difference is voltage which is negligible. The real power saving is in the cpu which by default will throttle down to save electricity & up when it's busy.

Both cpus are different in terms of prices & speeds & voltages. The price discrepancy could just be that e-tailer. In the west, 540 is more expensive than 530.

http://ark.intel.com/Product.aspx?id=46472&code=+i3-530
http://ark.intel.com/Product.aspx?id=46472&code=+i3-540

Okay, thanks a lot for your help

No problem. Have fun with the build.