Installing FH4 and FH5 gives me a error

Sorry I can't help you even further
But I really hope you can find a solution for this

Is it trying to install on WindowsApp folder? Can you check it for me please?

Can you rename the folder to WindowsApp.Old and try to install it again?

Also, please check if the WindowsApp is also the default folder for Microsoft Store:

Click on the search bar and type in “Settings.”

From the search results, select the Settings

Select System from the menu.

In the menu on the left, select Storage.

Now, under More storage settings, click Change where new content is saved.

See if the WindowsApp folder is the default.

Try it and see if it works. If this still doesn't work, I think there's no other options to try unless formatting your drive or Install a new OS on a new drive

So, about the first thing, I already did that before and well it did nothing.
Second fix - I changed it from C drive to E drive once again nothing.
Well thanks for your help maybe I will find a fix one day.

Understand. So I think the only other option is to create a local admin account on your PC:

Press Win+R Keys.

Type netplwiz and press Enter.

Click Add button.

Click Sign in without a Microsoft Account. If you do not see that option, disconnect from the Internet.

Click Local account if prompted.

Type the username you want, and the password. You must also specify a hint. Click Next.

Click Finish.

Make the new local account an admin account:

Select Start > Settings > Accounts > Family & Other Users > Select the Account Owner Name (you should see "Local account" below the name) > Change Account Type.

Select Administrator, and then select OK.

Sign in with the new Administrator Account.

After that:

Go to Start > Type Services > Open it.

Find all Xbox Services (Xbox Accessory Management Service, Live Auth Manager, Live Game Save, Live Networking Service). Right Click > Properties> Set the startup type to Automatic. Also Start them.

Go to Start > Settings > Accounts > Sign-in Options > Privacy > Uncheck "Use my sign-in info to automatically finish setting up my device and reopen my apps after an update and restart." Restart your PC.

See if it works on the new local account, please.

Thanks for your reply, unfortunately It did not work. Also I must note that xbox networking couldn't work with my bitdefender firewall enabled, still I tried to install it with it disabled and nothing. But thank you so much.