Go to your network connections
Add a network connection
Click next
Choose "Connect to the network at my workplace" and choose next
Choose "Virtual Private Network Connection" and choose next
Give it a name and choose next
(If you have other connections) choose Do not dial and hit next
Put in the IP address of the server you are connecting to and hit next
Click Finish
Right click the new connection and click properties
Go to the security tab and click the radio button for Advanced.
Click the settings button
Drop down the box for Data encryption and set to Maximum strength encryption
Make sure that MS-CHAP is UNCHECKED
Make sure that MS-CHAP-v2 is CHECKED
Go to networking tab and choose type of VPN to be PPTP VPN
Choose Properties on TCP/IP
Click Advanced button at the bottom
Untick the box that says: "Use default gateway on remote network"