This is not related to experience, but common sense, all big brands of computers should sell legitimate products, such as HP, DELL, as far as I know, they also occupy a large share of the Chinese market, they are large-scale piracy in the Chinese market? Perhaps there may be some misunderstanding or communication problems, as far as I know, some big brands of computer have pre-installed operating system on the hard disk recovery partition, does not provide the operating system install disc, but the restore disc.