Reinstall OS bro you are investing a lot of time troubleshooting By now you would have reinstalled OS and done with it   
Team,   Hope some one can help me with this. I have Dell G3 3579 laptop. I am not sure what went wrong, laptop start taking longer time to boot up. I have windows 10 with 125GB SSD. Looks like no problem with OS, but I feel it is with BIOS. The laptop takes 20-30 sec in Dell logo with loading circles. I have disabled pretests set to 0 sec in BIOS. I have also tried to do BIOS flash update and it successfully completed with no luck.  Please can some one advise?
G3 3579 stuck at DELL logo for 20 secs