I bought an HP Pavilion 510c 5 months ago and it has been nothing but trouble. After a couple of months I received the message "operating system not found" rendering the computer unusable.
It was returned to HP who installed a new hard drive.
Upon its return to me I began having a problem on startup and upon rebooting where the screen it would just be blank. HP stated it was probably a motherboard problem and decided to send me a whole new 510C.
Guess what? It had the same blank screen problem. I have been instructed by HP at least 10 times during the course of all these problems to restore my computer to its original factory settings which means that at least 10 times I have had to reinstall all my programs such as my virus scan, etc.
This takes hours each time I do this.
My warranty runs out next month which I guess will be great news for HP --- they'll not only have received my money for the computer but now they'll be able to charge me for tech support.
My next computer will definitely not be an HP.