The first case: The computer can be started just want to change a system to play
Want to install what system, download what system files, generally 1G to 5G, if the end of the ISO is a compressed package, extract to the computer do not put on the C drive, also do not put on the desktop. After extracting it, find Autorun or install a similar program and double-click Run. After the installation of the C-drive or the desktop may disappear, so do the file backup or transfer.
The second situation: some of the functions of the computer is not normal, the card is slow, the system rushed to collapse, you can refer to the first case, you can also refer to the following third case.
The third case: The computer does not start, or has been blue screen, black screen
Prepare an empty U-disk to at least put down the system installation files. The next "U-start" is similar to the one that allows U-disk to have the U-disk start-up function (I know your computer is broken, do it on someone else's computer). After the production is inserted into the computer, open the computer to enter the BIOS interface, select the computer to boot the order of choice U disk priority, U disk after loading remember to change back. This is more jerky and difficult to understand, I first understand the next, do not understand that asked me. The other basic is on the default.
Re-install the system (self-reliance, no longer worried about the computer is broken)