Redeeming a Microsoft Office 2010 Professional Plus Retail key is really simple, just follow these steps:
Download the software from one of the below links and activate the key:
64-bit:
https://mega.nz/file/uY5CQQgD#0QtQi8Bt3GjatAaCNDu7HDRbIyOZyQDV5Fv34sVLZS0
32-bit:
https://mega.nz/file/rRgCBKaa#KMJQdraXw61Faex61HQ1jG0KO1B1DefmRKSaJHUShr4
The key is not working
If you have activated the key according to the guide but the code appears not to work, please check what type of error message you receive and depending on it follow the appropriate instructions: