Nemáte náhodou nainstalovaný AdAware?

I had this same problem on my Windows XP Pro system. Upon login I got an error message saying "Failed to locate application resources." The header in the title bar simply says "Header".

By comparing the running processes while the box was open and after I closed the box, I identifed the source as AAWTRAY.EXE. I had recently removed Lavasoft Adaware from my machine and apparently it did not cleanly uninstall.

To resolve this, I reinstalled the latest version of AdAware, then uninstalled it, then deleted the Lavasoft folder and restarted. That did the trick.

Hope this helps!