How to disable internet connection only for some standard user accounts in Windows 7 Ultimate?

There are many users in my machine with Windows 7 Ultimate installed. Some of them are standard user accounts that have no administrative access to the computer. I want them to be unable to connect to the internet because of security issues. How to disable internet connection only for some standard user accounts in Windows 7 Ultimate?

• Windows recommends using Parental Controls

Tweak internet explorer:

• Go to Internet Options in the Control Panel in the users account. Go to the Connections tab and click LAN settings. Uncheck "Automatically detect settings" and then check "Use proxy server" and put settings in for a proxy server that doesn't exist. eg 1.0.0.0 (1.1.1.1 is cloudflare dns) This will time out the Web browser each time a user tries to pull up an Internet site. Unfortunately, a savvy user could go into the settings and fix this.

User profile permission hacking (Medium)

• creating a new user profile and then choosing 'deny' on ntfs permissions for read and exectue on the executables for Mozilla,IE or Chrome, on that account.

Stops them from using internet, but MSN or any other pre isntalled messenger will still work.

• Using Group Policy Editor (Advanced)

Create new group and apply the policy

1. Create a new policy in GPMC by right-clicking your domain and pressing New. Name the policy No Internet. Or Press windows + R, the run windows will show, type in gpedit.msc
2. Right-click No Internet and press Enforced to check it.
3. Select No Internet in the left-hand pane, select Authenticated Users under Security Filtering and press Remove, and OK to prevent the policy from applying.
4. Using Group Policy to implement Internet Explorer settings, navigate to User Configuration / Windows Settings / Internet Explorer Maintenance in the No Internet policy.
5. Right-click Internet Explorer Maintenance and press Preference Mode. NOTE: If a policy is already defined, you must press Reset Browser Settings, which will reset any Internet Explorer Maintenance Group Policy, before you press Preference Mode.
6. Navigate through Connections and double-click Proxy Settings (Preference Mode).
7. Check Enable proxy Settings, Use the same proxy server for all addresses, and Do not use proxy server for local (intranet) addresses.
8. Type 127.0.0.1 into Address of proxy and 80 into Port.
9. Press OK.
10. Close the No Internet group Policy.

NOTE: To prevent a user from changing their proxy settings, implement Disable changing proxy settings or Disable the Connections page in the No Internet policy.

To prevent a user from accessing the internet.

1. Select the No Internet group Policy under your domain and press Add under Security Filtering.
2. Use the Advanced dialog to locate and select the user, pressing OK.
3. Press OK.
4. If the user is logged on, force the policy to update.

I don't think there's a foolproof way to do this on a local machine. There are few options you can consider but they can be circumvented if the user is technically adept. The following post describes such a method.

Disable internet access in windows for specific user accounts

Alternatively you can consider Parental Controls