I found a temporary solution, for the problem with that ‘unable to creat’ thing.
My PRoblem was now, that I started GW yesterday and everything was working…then I started it today and I got that error code. I had that problem for nearly half a year after the release of GW2 and it was my virtual space, which made problems.
But now it didn’t work. So I took the GW2.tmp from the normal GW2 folder and made gw2.exe out of it (surely renamed the original gw2.exe before). And it works. But I’m not sure how long it will stay like this.
So it seems to be a problem with the temp file the game creates. Something like the client couldn’t find that file…maybe?