HOW TO UNBLOCK SITES
Follow the step
1. Press Window+r to open run
2. Type system32
3. Find the folder name DRIVERS
4. After you find drivers folder find ETC folder
5. After you open ETC folder. Find Hosts then delete the Hosts
Follow the step
1. Press Window+r to open run
2. Type system32
3. Find the folder name DRIVERS
4. After you find drivers folder find ETC folder
5. After you open ETC folder. Find Hosts then delete the Hosts