It sounds like your Windows 7 installation might be encountering activation issues even after entering a valid product key. Here are some steps you can take to try and resolve this problem: 1. Manually Trigger Activation: - Go to Start > Control Panel > System and Security. - Click on System and then click on "Activate Windows now" or "Change product key." - Enter the new product key and follow the activation wizard to complete the process. 2. Restart and Check Activation Status: - After activating Windows, restart your computer to ensure that the changes take effect. - Check the activation status by going to Start > Control Panel > System and Security > System. 3. Check for Windows Update: - Make sure your Windows 7...