I tried all the things that is discussed on all the websites but it didn't work. My Laptop is Dell vostro 1550 window 7 64bit with 10gb ram dual core processor. Downloaded the latest version Adrenaline 2020 but its still not working.
ERROR LISTED BELOW
1. Sometimes it shows a -Transparent- unfunctioning Radeon Software on the leftside of the screen. so help me on this if somebody can. 
2. No Roll back Driver Is available
3. AMD RX 550 series (Radeon Software are currently unavailable. Please try again after connecting a display to AMD graphics and extending the display), 
if anyone can fix do reply
-Thank you....