Step 2 -->Open "C drive"
Step 3 --> In c drive open "windows",
in windows open "System32",
in system32 open "Drivers"
in drivers open "etc"
Step 4 --> In folder etc open the file "hosts" With notepad
Step 5 --> Type (for example) "127.0.0.1 www.google.com" or "127.0.0.1 www.yahoo.com"
Step 6 --> Save the notepad file
Step 7 --> Now the particular website will not open.