For a while since loading Silverlight 4/5/SDK/Toolkit – I’ve been having issues with VS 2010 starting. It will take about +30 secs , the status bar indicates:
Loading toolbox content from package Microsoft.VisualStudio.ide.toolboxcontrolinstaller… {guid}
After this quick fix – all projects load instantly (i.e < 5 secs from tfs)
NOTE: Ensure you have a backup of the registry before performing this:
1. Close all instances of VS 2010
2. Using RegEdit, rename all instances of the key {2c298b35-07da-45f1-96a3-be55d91c8d7a} on the machine you are having performance problems with
3. Relaunch VS 2010, In the toolbox, Right Click + Resettoolbox.
The last operation will reinstate your custom toolbox.