Secure your email and chat

to send and receive secure encrypted email use
http://www.hush.com/

to securely chat over MSN, Google, AIM and many other IMs use pidgin
[formely gaim] download it here
http://www.pidgin.im/download/windows/

then download the OTR windows 3.2.0 plugin
http://www.cypherpunks.ca/otr/#downloads

and for help setting up OTR, follow these steps
http://www.cypherpunks.ca/otr/win-install/otr-setup.html