Thank you Brian, I already checked Windows Defender. It didn’t cause the problems. I tracked the problem down to Conpal LAN Crypt. I have no information what it does internally, but these are the startup times:
* Conpal LAN Crypt uninstalled: 40 seconds
* Conpal LAN Crypt installed, not active: 80 seconds
* Conpal LAN Crypt installed, active: 2 Minutes
It should only access the network folders, but apparently it has some influence even if MyEclipse and JBoss run on the local drive.