Aspire One disk needs to be checked for consi

Hello, I have an Aspire One net book that is not working. When I try to boot it up, it says that the disk needs to be checked for consistency. After its done it says theres an error in the output and it starts all over. If i skip the check, a blue screen pops up for a second and restarts. I never got the chance to back it up on an usb drive so i cant do that. Id like to reset the whole thing and wipe it clean. If anyone can help id appreciate it.