Thank you for posting the photos, that definitely helps.  I have the light blue BIOS also, but it's somewhat custom to the PC. In your photo showing SATA Operation, switch it to Raid Autodetect / ACHI.  If by chance that doesn't work, try the option ending in "ATA." You said SSD is your boot drive, so I take it you don't have RAID.  If your not familiar, RAID groups together 2 or more HDD's/SSD's as one. It looks like A17 is the latest BIOS for your PC. [IMAGE]  
Hello all, I understand that there is an existing thread very similar to this, but I will try to go into as much depth as possible about my issue to make it easier to diagnose the cause of the problem. So a few days ago I started getting the following message at boot; ' alert ! system battery voltage low'. At first I ignored it but it (obviously) showed this error each time I booted the pc. That day, I removed the CMOS battery and replaced it with a pre-used but still working battery. It was definitely the right type. I then booted the pc and still got the same alert as well as a 'previous processor thermal failure'. I restarted the PC a few times and reset and the bios settings, but it would always end up blue-screening (the error code was 'INACCESSABLE_BOOT_DEVICE'). A couple of days later, I bought a brand new battery. This time I waited 15 minutes before inserting the new battery (after removing the old battery). I still have the same issue. I've went through all BIOS settings, but I'm pretty inexperienced with computers so I was unsure of what exactly I needed to change, or whether it was a BIOS problem at all. There's also a possibility I could've damaged something while removing the battery, but its unlikely as I was very careful when doing this. If you require, I can send a list of hardware specs. Please ask any questions if you needed. Thanks
Windows not booting after replacing CMOS battery. (Precision T3500)