When I download Avast Security Premium for Windows 10 64 bit Pro on my Microsoft Flight...

Yes, this issue is only experienced with the flight sim, other apps downloaded off the Microsoft store still work as intended. I'm currently running on Windows 10 Pro 64-bits. I've also tried clearing cache, I clean booting my pc, and checked hardware requirements. Thanks for responding so quickly!

Oh, and Windows 10 Pro 64-bit with all the latest updates

The only software that can be working in the background is the eset smart security premium suite.

Hi,

I'm really not a big fan of these all in one 'premium' security software suites. When it comes to installing and running games, they tend to be overprotective, stopping applications that the security software either doesn't recognise or often thinks (incorrectly)
is dangerous and stops it from working at all.

Sometimes these third party security applications just don't work well with Windows 10 games from the Windows Store.

I'm a PC enthusiast and build my own PC gaming systems. I only run the standard Windows 10 built in Anti-virus. I stay away from 'iffy' websites and dodgy links and I've not had a major system virus in years.

When I had Avast Anti-virus installed, it wouldn't let me run FH4. It would load, show the splash screen, even get to the intro, them immediately close without any error messages. Once I removed Avast, it started working.

When I upgraded to Windows 8 Pro 64-bit I did a clean install, and it has seemed to fix the problem.

... Also in the system requirements for the games islt says attention. You are on a (X86) system you need a (X64) system, well im im confused because im running a 32 bit system with a 32 bit version of windows 10 pro (fully up to date).

As you say you are running a 32 bit version of Windows 10 (i.e. a X86 version), you can't run apps and games that require a 64 bit system (X64).

You would have to completely re-install Windows 10 to upgrade to a 64 bit version (if your PC hardware supports a 64 bit OS).