Reinstall Ubuntu Without Losing my Personal Folder
Solution 1:
This is easily achievable in Ubuntu simply boot to a live cd and choose something else.
Then in the partition manager find the partition you have Ubuntu on and choose this as you install as normal (mount as /) but MAKE SURE YOU DO NOT FORMAT THE DRIVE by unticking the little box and keep the user name and password the same, or you will not have the permissions for the folder. When you re-install just your system files will be installed and the /home folder untouched.
WARNING - You must set the theme to the default theme and the icons etc as every thing stored in the system folders will be deleted.
NOTE - People (including me) have had no wifi on reinstall, you should Google this first to check any risks.
Good luck..