I've quite happily been using the 494 version of Studio 4 for some time now.
This morning when I went to use studio 4 after not having used it in a couple of days, it came up and ran but said it could not load any of the plugins.
The only thing I can think of that I did different to my system in the last couple of days was to upgrade my Norton antivirus to version 2007 and then run a full system scan.
I disabled as much Norton's features as a could, uninstalled studio 4, and reinstalled it.
Now when I start it, it shows the flash screen and nothing else. It just goes away. It doesn't even appear to run.
Any ideas on how I can diagnose this? It may have nothing to do with Norton and may be something else entirely.