Is there anyone to play it on Vista? Even with Compabillity on XP/ME etc.? And also, can you use a patch to patch a demo version? Or has it to be the whole version?

There is no official compatibility patch or update for Worms Armageddon regarding Windows Vista support. However, check this link (http://www.nanacide.com/wahelp/installguide-original5.php) for some information gathered by the players regarding Vista compatibility.

Is there anyone to play it on Vista? Even with Compabillity on XP/ME etc.? And also, can you use a patch to patch a demo version? Or has it to be the whole version?

Worked for me.

1) Get and install the latest patch (http://wormsarmageddon.team17.com/main.html?page=supp&area=upda)

If this fails:
2) Open the Worms Armageddon folder and look for WA.exe. Right-click it, under "Compatibility" choose "Windows XP (SP2)" compatibility mode.

If this fails:
3) Try running WA.exe as Administrator. Right-click it, choose "Run as administrator".

If this fails:
4) Try to update your video driver.

In my case, after step 2 it already worked.

none of your sugestions have worked for me is there going to be a patch to solve this problem soon

Is there anyone to play it on Vista? Even with Compabillity on XP/ME etc.? And also, can you use a patch to patch a demo version? Or has it to be the whole version?

i have never seen a patch for the demo version nor have i ever seen the demo version.

i have never seen a patch for the demo version nor have i ever seen the demo version.I don't think it works on XP.