VirtualBox 4.0.4 Bridged Networking Slow

Win7 Guest Network Settings
Win7 Guest Network Settings
Host:
Ubuntu 10.10 Maverick Meerkat

Guest:
Windows 7 64bit

Networking:
Bridged

Problem:
This configuration slows down both guest and also host networking dramatically. Till now, I could not find out what the problem is or how to workaround.

Solution:
I anyone knows, please tell me!

Small Script for archiving with 7zip

Use this script to archive directories with 7zip (wont work for files).