15 R2, checking media presence

Hi @jaryszek welcome to this free user to user Alienware laptop discussion forum. This is not Dell Support. 

"Checking Media presence" blue screen means the system did not find the boot drive. You have visited BIOS and your image says Boot Option Priorities are correct. It seems that the OS(C:) boot drive might be having problems. Please download CrystalDiskInfo x64 to check drive Health Status. CrystalDiskInfo - Crystal Dew World [en] (crystalmark.info)  See following image to see option for quick check and option to get more information. 

Please run windows Reliability Monitor and wait for creation of event timeline to load. How to use Windows Reliability Monitor to identify software issues | Dell US 

Please run Check Disk (CHKDSK) How to Scan a Hard Drive Using 'Error Checking' (lifewire.com) 

During Start up, at Alienware splash screen, press and hold down the F12 key to enter boot menu. Use Up and Down keys to find Diagnostics and press Enter key. ePSA Pre Boot System Assessment Dell Overview (Official Dell Tech Support) - UPDATED - YouTube You can stop full test, and click on bottom RH corner arrow icon to enter test menu, and just test the drives. 

Please think about BIOS boot list option to enable UEFI. How to convert MBR to GPT drive to switch BIOS to UEFI on Windows 10 | Windows Central

Please think about your Disaster Plan should the OS(C:) boot drive have an issue and cannot be recovered. Having a standby OS(C:) boot drive that can be swapped in within minutes is a good option. How to clone your PC hard drive using Macrium Reflect | Windows Central 

Thank you @crimsom .

I checked my disc condition and seems to be fine: 

Boot settings:

i suppose this is boot setting in bios. But i do not know how to fix it still.

And diagnostics is fine:


Best,
Pawel