hello

they had put a keylogger in your computer or the new subseven cgi that open ports in your machine and send the passwords to the internet.In this way they had your hotmail password.
Try to scan yoour computer ports from 1024 --->
SuperScan is good on that .
See your services running in your computer check the file internet.exe .There are not antiviruses that block tha file used from SubSeven cgi .
And about a firewall get WINROUTE Pro is the best one .

the best Revenge is when you make your system strong and let them understand that you don't care about the attack
If you had the subseven cgi in your computer let us know and i will tell you which is the best revenge.

i hope this helps

bye