Im pretty clueless.. A few minutes ago I tried to launch Zbrush 4. It didnt work. 
I double-clicked on the Zbrush shortcut icon on my desktop as always.
Usually Zbrush opens immediately. Not this time, unfortunately.
I already restarted my computer twice… but it didnt help. My Anti Virus program is up to date ( last update today) and I scanned the whole system -- no virus found. The last time that I zbrushed was about an hour ago. Everything worked fine. Then I shut down Zbrush because I wanted to watch tv. There was nothing really interesting and so I decided to continue working on a model ...and now I cant open Zbrush anymore.
I`m thankful for every help! 
Zbrush 4
Windows Vista 32bit
4GB Ram
