Trouble installing M 44

[BigDuke66]

I think the error message "String ISDX_ERR_INTERNAL" & "Error ISDX_ERR_INTERNAL" is just the usual error you get on the old HPS games when it tries to install directX, usually that isn't necessary anymore so you can forget about that, so I doubt that this is any problem.

Question is what problem comes up with the battles files, is there any error message?
And if you can't download something I doubt that the game is the problem.

If you got another partition try to install the game there, after that start the patch and let it extract to another folder and copy the content of that folder over into the games folder, usually at that point Windows Explorer(or whatever file manager you use) should ask/inform you that files are about to be overwritten, confirm that, if you were not asked/informed you copied it into the wrong place.
If it worked you should try to manually start the game by starting the EXE file to make sure no old/wrong links on the start menu interfere.
Following this procedure will make sure you are up-to-date and run the updated version of the game, and then we can see if the other problems are still there.