I'm currently downloading Guild Wars 2, which shows that it's downloading the pre-update files but then the speed just drops off. The window then disappears, reappears for a split second saying that "0kb downloaded" before finally disappearing, never to return.
I've tried running the downloader as administrator, trouble shooting compatibility, and disabling UAC. When reinstalling, I've even bought the disk and done it that way. I'm running Windows 7 Home Premium 64 bit.
How do I fix this?