"Best Buy" (the store) was deceptive and said I was getting an 8.1 machine laptop but it was only 8.0. I treated the machine as an 8.1 and all downloads from Microsoft updates refused to down load 8.1 saying that I was in fact only in 8.o!! I thought I was in 8.1 and set up the machine as if it was 8.1. Much turmoil ensured and I returned it and they wanted to charge me extra to install 8.1 (I attempted to down load 8.1 but each time there was a different down load problems from " not able to connect to update", to after 4 to 5 hours of downloading, and the update said "unable to complete update"). This was an ASUS laptop model X55iMA which also said that I was "connected but was not charging". This indicated to me that It was was a flawed machine ( I really do not know as I am n XP person). I have a 2 year extended warranted and they treated me with scorn and duplicitness on my part. This may have been an honest mistake on their part but their reluctance to accept my empirical data tells me that they do not want to be an honest broker to remedy the problem. I called their Geek Squad and they said to simply bring it in for a check up and free update to 8.1, but once I went into the store they wanted the name of the geek squad person and his I.D. number! They said that this was a necessary protocol to insure proper procedure and anti "lost control" measures. This means anti-con artist measures. I hope I am wrong as they always were always in the past honorable.