Hewlett Packard.
At the time I ran three peoples busy lives with my laptop as I was a carer for my grandad and becoming a carer for my increasingly disabled mum as well as myself and I needed to be able to follow up all sorts, contact people, do the online shop whilst sat with them. It was also my window to my friends as I could chat to them online via msn etc and various forums whilst not being able to see them at that particular time and also my form of entertainment at night when I had to sit with them because life was tough then with 2 dependant adults. It was a proper little lifeline.
The laptop developed a fault with its abating system and overheated to the point where it would turn itself off. It wasn't very old (6 months) so it was covered under the guarantee. I had to write a report as to what was wrong with it and mentioned that it was a heavily used, much loved and much looked after machine. (I had a proper bag for it, a cooling stand with a fan, it was used in a little fold up table etc) and please keep me informed.
It went back and had gone missing for approx a week before they found it. Then they kept throwing up all these errors and things that it hadn't gone in with allegedly saying it had been dropped (it hadn't) and it had had water poured in it. His actual words were that it was swimming in water when it got to them (not true at all even if it had, it'd been missing for 8 days before they'd found it in their system. What water would pool to the point of still "pouring out of the laptop" after then? And what silly bastard would plug it in if it was so obviously wet through to find these other alleged faults? I actually asked him "are you calling me a liar?" at one point in the call and he said "yes!"
Unluckily for him the call was recorded at both ends (thank you truecall!)
At the other end of the scales Staples (who I had bought it from initially were incredible when I reported it to them. I explained I'd followed repair procedure but they were doing everything in their power to try and essentially get out of repairing it without charging me £££ for work it didn't need and I hadn't done.
Within 24 hours of notifying them the area manager (!) rang me, gave me his personal number and said he would sort it and to come into store that day. Once there he told me they'd asked for the report and were taking it further as what I had reported and the recorded calls were clearly nonsense, they asked for the laptop back and were sending it for an independent report.
Within an hour of arriving I had a new, slightly more expensive laptop of a different make with a new bag, an external HD, a spindle of dvds to record to and a new laptop stand. They were incredible. They followed it through and told me not to worry and they'd deal with anything hp threw back because it was clearly someone trying to potentially fiddle the system.
Never bought anything hp (or compaq) since a d neither have my friends or family.