Thanks. Uninstalling KB978037 update fixed the problem for me.

I'm having the same problem and I believe it started to happen after MS Windows update last week or so.

Stuart Dootson wrote:

David Wulff wrote: In Vista I can hit the start button on my keyboard and type what I want to do and it does it. It is the killer feature of Vista IMO, and I cannot go back from that.

Try using Run++ (http://puzzleware.net/runpp/). Its free and its my alternative to QuickSilver on Windows although its no where even close to it.