When you try to install Windows Vista, you cannot select an upgrade option that is located in the Install Windows dialog box. Additionally, you may receive the following error message:

Upgrade has been disabled
- You cannot upgrade Windows in Safe mode. Cancel the installation, restart your computer in normal mode, and then try to upgrade again

When you start Windows Vista in safe mode and then log on to the computer, you cannot type any characters in an East Asian language.

Additionally, the language bar does not appear. Therefore, you cannot modify the language selection.