Yes, the Microsoft Office Professional Plus product keys offered on eBay for a few euros are likely to be useless for a private user. These keys are often sold illegally or are unauthorized resales, which means they may be invalid or revoked by Microsoft. Purchasing from unauthorized sellers also poses a risk of malware or other security issues. It is best to purchase Microsoft Office products directly from Microsoft or authorized retailers to ensure you are getting a legitimate and secure product. **

If you accidentally broke your radiator knob and the heating is running at full power, it's best to call a professional to fix it. Attempting to fix it yourself could lead to further damage or safety hazards. A professional will be able to assess the situation, replace the broken knob, and ensure that the heating system is functioning properly and safely. It's important to prioritize safety and have the issue addressed by a qualified professional. **