There isn't an option for to reset to Factory Default within the system menues.
To open the Factory Reset you have to power OFF the tab first.
- Power ON the Tab using the Power Button
- As the Tab starts directly press the big Home Button in front of the screen for about 3-4 sec
- There will show up a Triangel with caution mark and an Android
- Android System Recovery V.1.0 will start.
Now you'll have the choice between:
- reboot system now
- Update from sdcard
- factory reset
- wipe cache partition
To move between the choices use the Volume UP or DOWN key and use the big Home Button for to select your choice.
Hope that answers your question..
Regarding the Google Account, I don't know because I never was need to delete tha account data and settings. Sorry.
PS: If you get problem to power ON your tab after pressing wrong Key combination etc, use the RESET Switch (found just beside of the Audio/Headphone connector) using a Paperclip.
finally I got it!
Maybe someone is interested, that's what I did...
First of all I 'rooted' the tablet (for example with 'SuperOneClick' )
Second I installed 'Droid Explorer' on my PC, I looked for the file '/data/system/accounts.db', open it with the 'SQLite Explorer' (included in SuperOneClick) and 'DELETE FROM accounts WHERE name='EmailOfTheAccountToBeDeleted'.
Thank you to everybody who spended more than 1sec reading about my problem, and specially to that people who furthermore wasted more time answering ;-)
Roger Calver, I couldn't find that thread, but also thank you.