Whether the capitalization lock is on
Whether the digital lock is on
Whether it is the Chinese input state
Excluding the above after, if there is important information in the computer, with the system of the USB flash drive, CD-ROM startup, (or dismantle the hard disk will not be able to look for a connoisseur or on the repair store) to copy out, and then restored to the factory system (generally is the boot press and hold the F10 or some key).
If the warranty is not out of the customer service, the most worrying.