What is this and what can I do someone is sending mail to me and say(congratulations you won) ?

Sorry friend but there is no Microsoft, Yahoo other e-mail lottery, it's a scam do not answer do not give personal information.The following sites give more information

www.scambusters-419.co.uk

www.truthorfiction.com

.Also If you go to the following link you will get some info on ID theft www.identity-theft.org.uk the iinternet is safe enough if you are careful but please answer nothing that you are doubtful about.Good Luck and be careful

If you did not enter a contest, but win it, yes it is a scam. Never call or email them back, delete or mark the email as junk. I've won the spanish lottery once and the british lottery twice in the last month according to emails, but of course didn't enter either one.

Yes, they are all SCAMS. Check out the below link for confirmation of various email scams hitting the internet and how to report them :

http://www.hoax-slayer.com/email-lottery-scams.htm...

yea theyre all scams, dont even think to take them seriously. just click delete and dont waste any more of your time over this.