Amd radeon graphics driver wont download

I am using Dell latitude E6540 which is having dedicated graphics of amd radeon hd8790m. Since the first day I am having some serious kind of issue with installing amd drivers, whenever I install its official latest drivers from amd official site most of the time the installer just hang on middle and whole of system just freezes if I hard restart my pc, next time on booting display is totally gone, so somehow I needs to go in safe mode to uninstall amd drivers then display works. One time I got the graphics drivers for my AMD, but they're not updated in the dell's website (2015 drivers) and the FPS in games are the same thing compared to my Intel HD Graphics 4600. I think that If I could get the 2020 Adrenalin update, It would be better FPS.

The problem is that basiclly I can't. If somebody can help me or show me how can I get the 2020 update it would help a lot (pleeeease, a clear explanation step by step cause I just re-installed windows like 6 times since I'm trying to get the 2020 drivers and I hate this.. :/)

Laptop Info:

Operating System: Windows 10 Home 64-bit (10.0, Build 18363) (18362.19h1_release.190318-1202)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Latitude E6540
BIOS: BIOS Date: 06/13/19 06:38:48 Ver: A27.00 (type: BIOS)
Processor: Intel(R) Core(TM) i7-4712MQ CPU @ 2.30GHz (8 CPUs), ~2.3GHz
Memory: 16384MB RAM
Available OS Memory: 16290MB RAM
Page File: 9786MB used, 9446MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 12

Card name: AMD Radeon HD 8790M
Manufacturer: Advanced Micro Devices, Inc.
Chip type: AMD Radeon Graphics Processor (0x6606)
DAC type: Internal DAC(400MHz)
Device Type: Full Device