2011 15" macbook pro loud fans in bootcamp playing games never did it befor!

Try a SMC reset:

http://support.apple.com/kb/HT3964

Ciao.

Run an Apple Hardware test.

Ciao.

Yes;

http://support.apple.com/kb/HT1509

If it does not start as directed in the support article, try ALT - D.

Ciao.

Understand that the items you are referring to are high temperature creating applications.

First install from the Internet iStat pro. This widget will show you the temperatures and fan speeds of your MBP.

Try this test: Open Activity Monitor and set it up to 'All Processes' and click on '% CPU' and set it so that it shows the applications from high to low. Open one of your games, let it run a bit, and note the temperature and fan speed in iStat pro. In Activity Monitor, click on that application and then click on 'Quiit Process' (on the top).

There should be a drop in temperature and fan speed.

Another thing I suggest you do is open the MBP up and see if there is dust inside, especially in the fans. If so clean it out.

Ciao.

I do not use Windows, but it is my understanding that in an Apple OS environment it is a heat generator. A person well versed in you specific situation might be a better adviser. With that said, I would urge you to try what I have suggested, only to find out if there is a problem with your MBP or is it normal for the applications you are using.

Since you indicated that you purchased this MBP less than a year ago, your warranty is still in force. make a appointment at an Apple store genius bar and have them check it out. You will not incur a charge.

Ciao.

Have you tried cleaning out the two system cooling fans? Unscrew and remove the back plate and use a can of compressed air (available at any local office supply store) to gently blow away the dust from the two fans and heatsinks.