How can I Remove Trojan.PolyCrypt.h?

My computer was attacked by Trojan.PolyCrypt.h just now, my free scanner detected it and I even don’t know how and when it came into my computer? Any idea?

Introduction of Trojan.PolyCrypt.h

Trojan.PolyCrypt.h is a malicious keylogger which can help the hackers record everything you type into your computer. Computer system versions like Windows Vista, Windows 7 will probably become its targets.  It can enter your computer via spams, malicious links online and loopholes created by the residual viruses. It can be very aggressive and destructive, so don’t waver to delete it.

Remove Better PriceChec Safely and Quickly

General Introduction 

Name: BetterPriceChec
Type: Browser add-on
Geographical Distribution: BetterPriceChec has infiltrated lots of computers around the world.
Targeted Browsers: It may targetat popular searching engines like Google Chrome, Firefox and IE.
Operating Environment: BetterPriceChec is able to sneak into all versions of Windows including Windows Vista, Windows 7and Windows 8.

Brief Introduction about BetterPriceChec 

BetterPriceChec is an unwanted extension which can be installed into your computer stealthily by its nasty creators to display countless ads. It can find its way into your computer as the hidden apps attached to the junk mails or the freeware on the Internet. So, sometimes, you can hardly notice its appearance until it infects your browser.