1.Change Your Google a/c Password
https://www.google.com/accounts/EditPasswd?hl=en-US
2.Prevent viruses and spyware on orkut
http://help.orkut.com/support/bin/answer.py?answer=57431
3.Protect your account
http://help.orkut.com/support/bin/answer.py?answer=57442&topic=10307
4. if your google account hacked
If your a/c hacked, Please Report it here
http://www.google.com/support/accounts/b
