Recently, I had to look into Windows vista related issues on two computers. One in Delhi and another in Hyderabad. In both the cases, dealers promised customers that their system will have X size of RAM and delivered Y size of RAM in the system where X > Y.
In Delhi, they told that system has 2 GB of RAM, while it has only 512 MB. Vista was running very slow. While customer was under impression that it is Vista issue that it is running slow even on 2 GB RAM, actually it is the false promise or probably cheating by dealer which led to the bad name for Microsoft. Dealer may have taken out the RAM from system.
Again, when I tried to install Vista on Hyderabad based computer, it stopped installation after saying that only 256 RAM is available. I had to open CPU case to convince the user that this system actually has only 256 MB RAM while he was under impression that it has 512 MB DDR2 RAM which as per dealer is equivalent to 1 GB of DDR1 RAM, another preposterous claim.
In both cases, users are actually reluctant to call HP support and call the bluff of dealer. Reason being that the dealers send their technicians mostly to reinstall pirated OS whenever there is any corruption on the system. For them, dealer is HP support and probably they are not even aware of the existence of call center.