The simple and easy solution to fix the checking media boot loop problem. It happens when your HDD is formated in MBR and boot option is set to UEFI mode, or when HDD is formated in GBT and boot option is set to Legacy mode.
You can fix this problem by using the Lenovo Solution Center which you can download from Lenovo's official website. http://support.lenovo.If your computer is having trouble accessing the hard drive, this could be caused by a problem with the file system on the hard drive. There are several things you can try to fix this.