I think most of these 5 star reviews are fake notice that 3 in a row are titled 'excellent' I am a IT engineer and some of the 5 star comments are nonsense, someone stated 'all I had to do was unplug the cpu then plug it back in and it worked' to be honest i dont know how that would help, cpu's only go into the mobo one way so its not like there would be a chance it is not sitting on the motherboard properly.
Also i would encourage people who have bought this system to check the hardware components listed because the Radeon 6670 is a fairly decent card and some people are saying they are struggling to run games which shouldn't happen with this card installed leading me to believe it probably isnt a radeon 6670. you can check your system specs on windows 7 by clicking start and typing DXDIAG into the search box and clicking on the program when it displays in the results box or just press enter.
It also looks like he is installing pirated versions of windows on the computers and charging the full price for those that ask for the operating system so a word of warning for those that dont want ripped off.
The hdd's might also be second hand which might be the reason for them causing so many problems, hard drives only have a limited life span and tend to generate alot of errors when they are on their last legs before eventually failing permanently. I would suggest it was a bad batch if it were not for this sellers reputation. A second hand hard drive would cost next to nothing compared to £40-£50 for a new one, who knows you might have old ram sticks aswell thats why anyone who bought this system should check their components.
I would recommend everyone to avoid this seller, i just thought id make this post to try and help anyone affected by this mans lack of authenticity.