Hamachi and Cisco VNP Crash Computer

I don’t know why, but they just don’t seem to go together. Having the Hamachi Network Interface enabled makes my computer crash after some minutes if I start Cisco’s VPN adapter. It first happened when I opened some PDF at JSTOR. Even if I avoided PDFs via the VPN, the computer hung itself after a while. Anyway, since Hamachi doesn’t disable its network connection after use, and since I’m too lazy to do this manually all the time, it’ll do without this tool.