Since Office 2010 is no longer supported and can be difficult to activate, consider these free and legal alternatives: Activate Office 2010 - Microsoft Support

If you have a valid product key but are unable to activate online, you should use the Activation Wizard within the software to perform a telephone activation. Open an Office Application : Open Word or Excel 2010. Navigate to Activation Activate Product Key Choose Telephone Activation

No — Microsoft tracks each product key's activation count. Retail keys allow 1-2 concurrent activations. Volume license keys are managed through KMS or MAK systems.

If you own a legitimate retail license for Office 2010 and need a Confirmation ID because internet activation fails, you must contact Microsoft directly:

If you're reinstalling on the same computer with a legitimate license key:

If you need help with a lost product key or activation issues for a legitimate copy, I can guide you on contacting Microsoft support or using official recovery tools.