It seems like you're facing an issue with the computer ID changing every time you restart Windows 7, causing problems with a program that is registered with your computer ID. The computer ID you are referring to might be the Machine ID or Computer SID (Security Identifier) that Windows uses to identify a computer. Here are a few points to consider and possible solutions: 1. Why Computer ID Changes on Restart: - Windows generates a unique SID for each computer during installation. This SID is used for various system tasks and is crucial for security. - Sometimes, specific scenarios can cause the SID to change, such as when restoring system images or cloning the system. 2. Implications of Changing SID: - If the SID changes frequently, it can impact certain applications that rely on the SID for registration or licensing purposes. 3. Potential Solutions: - Sysprep: You can use the System Preparation Tool (Sysprep) to generalize a Windows installation, which can be useful in scenarios like yours. - Registry: - Registry Modification: Editing the registry to change the SID might help, but it's a complex process and can have unintended consequences if not done correctly. - Third-Party Tools: There are third-party tools available that claim to modify the SID safely, but caution is advised when using such tools. 4. Automated Solutions: - Consider scripting options to automate the process of maintaining the SID. However, this requires a good understanding of Windows internals. 5. Consultation: - For critical systems, it might be best to consult with IT professionals who have experience in handling SID-related issues to avoid any potential risks to your system's stability and security. Given that you are using the Windows 7 64-bit Release Candidate (RC), it's essential to consider upgrading to a more recent and supported version of Windows to benefit from improved compatibility, security, and stability features. If you provide more specific details about the program you're having issues with or any additional context, I can offer more tailored advice. Let me know if you need further assistance!