Anytime, Gus.
If you want to experiment, perhaps I have an idea...I don't like giving up that easy.
Download the AMD Beta driver below that verification tool file at the link below.
http://support.amd.com/en-us/download/mobile?os=Windows 7 - 64
Don't run it or anything.
Now download and install the free 7-zip file utility.
http://7-zip.org/
After you install 7-zip, right click on the amd beta driver you downloaded and select the 7-zip utility and select the option to extract the file to a folder.
I did this earlier and there is a driver for your graphics adapter in there, so I hope this works.
For starts, just open the folder so I can show you what I am looking at.
Go to $_OUTDIR\Packages\Drivers\Display\WB6A_INF\and you will see 3 setup information files.
Now, this is where we may just going to have to try by trial and error.
I think the file you need is the one named CU165580.
I think that because I ran the exe files next to those and on the first one, I got an install for Vista, the second one, an install for W8, and the 3rd one didn't show anything, but I will assume it is for W7.
Now just click on the CU165580 driver setup information file and scroll almost to the bottom and you will see the 7420G graphics adapter listed 7th from the bottom.
So, now that you have seen the file and the list of devices supported by it, it is time to try and install it manually.
Go to the device manager and click to expand the display adapters category. Click on the Radeon vga adapter.
Click on the driver tab. Click on Update driver. Select the Browse my computer for software method and then select the Let me pick from a list of device drivers on my computer.
Select Have Disk, and browse to that CU165580 setup information file and select the AMD Radeon HD 7420G graphics adapter from the list, and see if the driver will install that way.
Now, if for some reason that doesn't work, I would uninstall all of the amd radeon drivers and software, reboot and try the above method again.
You may even want to reinstall W7 all over since you now have all of the drivers and use this process second after installing the chipset driver and see if you get a good install.
Good luck, and may you have a great New Year as well!
Best Regards,
Paul
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