Blocking web sites with Windows Firewall

First of all Go to Command Prompt and Do Ping URL to get IP address of that website:

Ping example .com

and you get IP Address of website

Pinging example.com [93.184.216.119] with 32 bytes of data:
Reply from 93.184.216.119: bytes=32 time=287ms TTL=43
Reply from 93.184.216.119: bytes=32 time=286ms TTL=43
Reply from 93.184.216.119: bytes=32 time=285ms TTL=43
Reply from 93.184.216.119: bytes=32 time=294ms TTL=43

Ping statistics for 93.184.216.119:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 285ms, Maximum = 294ms, Average = 288ms

go to Control Panel > windows FireWall > in the left side click Advanced Setting

go to Outbound Rule and in right side Click New Rule 

• in New OutBound Rule Wizard select Custom and click Next
• in Program Screen Select All Program And click Next
• in protocol and ports Leave default Setting and click Next
• in Scope Screen Under Which remote IP address Does This rule apply to? select These IP address and click add Button
• in IP Address Dialog under This IP address or subnet: enter IP address of website and click ok and then click next 
• in Action screen select Block the connection and click next
• in Profile screen leave all 3 check box selected and click next
• in Name Screen choose name for rule and click finish
  test what you do by enter URL in any browser that you want
  good luck!