Hi, Natalies18. I'm sorry to know you're getting this hardware issue.
There are many reasons why this issue occurs. If suddenly all disks are not recognized, motherboard must be damaged. Also, modified Bios values can generate this issue.
I recommend you to reset Bios settings to factory values. If that doesn't solve the issue, please contact your computer manufacturer support staff.
If you need something about Windows or additional information, please let me know.