Winscp - an alternative for Windows
The alternative to Unison for Windows is called winscp.
Installing WinSCP
WinSCP can be downloaded from the WinSCP website.
Using WinSCP
Start WinSCP, then
Use ssh to connect to ssh.damtp.cam.ac.uk. Select your remote and local folders.
Next to synchronize your home directory with your laptop select Command from the top bar, then Synchronize. Make sure Preview Changes is ticked.
You may be interested to know that winscp can also do automatic synchonizing between local and remote directoires.