2009 SP3.0 switching documents taking forever

I recently upgraded to SP3.0 of SW2009. Since doing so, whenI open a part from an assembly, or simply switch between opendocuments, it is taking forever! It seems to be around 1m30s-2min!!Sometimes longer. And the parts I am changing too aren't featureheavy - they have maybe 5 features. In fact, switching to the smallpart seems to take longer than switching to a large assembly!

Has anyone else experienced this and does anyone know a solution?

SolidworksAdministration