Microsoft Security Essential Blocking Host File from being modified / changed

an IT admin would usually modify the host file to prevent certain computer from accessing a specific website.  The fastest way would to be access the computer through \\(computer name)\C$\Windows\System32\Drivers\etc and modifying the host file. However, with the new changes MS security essential did to their virus scanner, any time the host file is modified, MS security essential would flag it as a potential problem and prevent any changes to the host file.

Here are the step you need to solve this problem:

System: Windows XP Sp3 (Host file is in a different location for Windows 7 and Vista)

1. Remote into the client’s computer using RDP
2. Go to My Computer – C: – windows – System32 – Drivers – Etc – Host
3. Open with and select notepad
4. Add in the website you wish to block and click save
5. a Microsoft Security Essential popup would appear that looks like this
   
6. Click on show details
7. The detected items should be a settingmodifier:win32/possiblehost change
   
8. Change the recommended action to Allow
9. Click Apply Action
10. Once the action is complete, click Close
11. Save the Host file and re-open the file again to verity the changes has been made
12. Test the website to make sure the website/webpage has been blocked
13. Done!