Hi, my name is ***** ***** welcome to JustAnswer!
I have to be honest with you on the front end, it sounds like your hard drive has died. But let me get some information from you so that I can make an accurate assessment.
Do you currently have any other devices plugged into the machine, such as an external hard drive or USB flash drive? Also, did this issue happen suddenly, where one day you turned on your computer and it worked fine and the next you received this error?