You have been more than patient and your comments are very mild in view of your time and money wasted on this.
While all companies have some complaints and it would be wrong to make purchasing decisions on the basis of one or two poor reports here, the number of posts about Carrera, taken together with Carrera's lack of response, seems to go beyond the usual. I would simply urge anyone now seeking a new computer to be very cautious about dealing with this company.
Carrera is still listed in PCAdvisor as having a thread on Consumerwatch. I would like this reviewed and their name taken off because of their lack of response. It is misleading to potential purchasers who may think that companies listed in the magazine as having threads are in some way 'more reliable'.