Yes, there are several techniques to disable a computer's internet access without damaging the hardware. Here are some methods: 1. **Physical Disconnection**: Completely disconnecting a computer from the internet can be achieved by disconnecting the Ethernet cable, removing the Wi-Fi adapter, or removing the cellular module from the device. 2. **Software Restrictions**: You can use a variety of software tools: * **Hosts File Editing**: Edit the computer's hosts file (`hosts` file) to block access to specific websites or all websites. * **Firewall Rules**: Configure firewall rules to block all outbound internet traffic or restrict access to specific websites or IP addresses. * **Internet Options**: Modify Internet Options in Windows to disable internet access. For example, you can set a proxy server to an invalid address or set up an automatic configuration script to block internet access. 3. **Network Configuration Changes**: Modify the computer's network configuration to block internet access: * **IP Address Changes**: Set the computer's IP address to an invalid or unroutable address, such as `0.0.0.0`. * **Subnet Mask or Gateway Changes**: Modify the subnet mask or default gateway settings to block a computer from accessing the internet. 4. **Keychain software**: Block a computer from accessing the internet using keychain software (also known as a "keychain driver"). These pieces of software are injected into a computer's operating system and restrict internet access. 5. **MAC address filtering**: If you have a router or network device, you can configure MAC address filtering to block specific devices, including the computer for which you want to disable internet access, from accessing the internet. 6. **Network Access Control (NAC) System**: If you have a NAC system, you can configure it to block specific computers or devices from accessing the internet. Keep in mind that you must take steps to prevent users from circumventing these restrictions, such as: * Configuring computers to use only specific network profiles. * Using strong passwords and limiting access to user accounts that may modify network settings or install software. * Monitoring system logs and network activity to promptly detect potential-threats. Before disabling a computer's internet access, make sure you have the necessary permissions and authorizations. Keep in mind that these methods may not work for all scenarios, so choose the most appropriate method based on your specific needs and requirements.