Hi Tinarosa, welcome to the Seven Forums.
If I understand your question correctly you do not have issues with your user account on Windows but instead with your Google account.
Are you possibly using Google Chrome browser? If so your data file could be damaged and you could try this:
- Close Chrome
- Go to folder C:\Users\Your_Username\AppData\Local\Google\Chrome\User Data\Default
- Delete the Chrome data file. It's called Web Data:
(Click image to enlarge)
- Restart Chrome
If you no longer get the error message, everything is OK. If you still get it come back and we'll look further.
Please notice the Web Data file contains for instance stored passwords so be sure you remember those before deleting the file!