Too many large workspaces, workspace has too many objects, OLD workspaces, workspaces kept after a major windchill update, .wf folder kept after a major windchill update. There are a ton of potential issues. But since you recently did windows update, its possible a windows file has been corrupted on your computer.
You could also have a setting that is different than your coworkers computers. You can try removing all your config.pro/config.sup, creo_parametric_customization.ui and test, you might have to add a temporary new config.pro to get your basic connection settings. Or copy a working set of files over to your computer from a coworker.
Re-imaging your computer may test also be a possibility to test if you've have a corrupt window file.
