MSI a2 Error

[Cukii]

My pc won't start up normally anymore. I'm getting the a2 error always. It started few days ago, then i just needed to unplug all my usb devices and then it started without the error. But now when i unplug mu devices it shows me d7 error. Only way i can access my pc is I reset my cmos and then i can use it until i turn it off. I haven't got any help from other threads.
My specs are:
Windows 10
Mobo - MSI Z77A-G43
CPU - i5 3350p
RAM - 8gb Corsair Vengeance
GPU - MSI GTX 1060 3gb
Storage - 120gb SandDisk SSD Plus and 2000gb Seagate
Cooler - Corsair h55
PSU - EVGA 500w Bronze

 

[Dark Lord of Tech]

"Usually" an issue detected when there's something wrong with a storage device.