Microsoft Remote Desktop Connection is Microsoft's own proprietary software that enables you to connect from your Mac to a Windows computer.
Microsoft Remote Desktop Connection allows Mac users on the same network as PC users to access and connect to them much as they would to any other Mac. It's important that the Windows users are running Terminal Services or Remote Desktop Services in order to allow access from other machines.
Setup is very easy. When you have the main dialog box open, all you need to do is enter the network name of the computer you want to connect to or its network ID. A connection should be established immediately as long as Terminal Services and Remote Desktop Services are activated on the host otherwise connection will be rejected. There are many preferences you can configure according to the resolution you want to use for the shared Window and which hard drives you want make accessible.
However, Microsoft Remote Desktop Connection does have a tendency to suffer from instability from time to time as many users have found out. You may find that it occasionally freezes during a sharing session. In addition, note that it doesn't work in 32 bit mode.
Microsoft Remote Desktop Connection is generally a very easy and painless way to connect to a PC although it's far from perfect.