I'm having a hard time with my Windows XP. Ctrl+A combination does not select all text in some textboxes throughout whole system. For instance it does not work in start->Run command window nor does it work in my own WinForms application that I've developed under .NET 3.5 framework.
On the other hand CTRL+A does work in Firefox or IE8 location bar.
What can be the source of that problem?