Step 1: Run Microsoft defender to remove spyware from your computer: http://www.microsoft.com/windows/products/winfamily/defender/default.mspx
Step 2: Run a free virus scan by: http://go.microsoft.com/?linkid=8248809
Step 3: Make sure that your PC is in top running condition by getting up to date with all Microsoft updates: http://update.microsoft.com/
Step 4: Enable your phishing filter, pop up blocker, security and privacy settings in IE.
http://www.microsoft.com/windows/downloads/ie/getitnow.mspx
Step 5: Educate your self. Knowledge is power (and in the online world, knowledge is safety): http://www.microsoft.com/protect/default.mspx
Stay safe!