Visual Studio解决方案资源管理器锁定

I have an issue with Visual Studio 2005 w/ TFS where, from time to time, the Solution Explorer will stop responding to interaction. Instead it does the beep, like I'm trying to click on a parent window with a modal dialog visible, but there isn't one. The only thing I've found to do so far, is to restart VS, but that's kind of a pain because our solution is rather large. And it's not even a guarantee... it might happen again when I load the solution.I have an issue with Visual Studio 2005 w/ TFS