Vista - VS2005 Basic Hangs when changing from Code window to Design Window

When I change from the code view to the design view of a form in
Visual Studio 2005 (VB.NET) The design environment hangs for up to
five minutes with a blank screen where the form should be.

I have installed the latest service pack and upgraded to 2Gb RAM. I
have a Centrino 1.9Ghz processor. The problem seems to have got worse
lately.

It appears that the designer hangs whilst the form is rebuilt from the
designer code - or something like that.

Cannot find anything in the support area of microsoft and wondered if
anyone else has experienced the same problem.

Better than knowing the cause of this would be to know how to resolve
this, and I thank anyone in advance for any feedback that will help
me.

Many Thanks

Terry