Enabling Language Support in Windows Vista
Open Control Panel - depending on you interface settings, this could be on the desktop, directly from the Start menu, or from Start > Settings. Open Regional and Language Options
Click the Keyboards and Languages tab, then Change keyboards...
Click the Add Button. Scroll to the language of your choice, then click on the + sign next to it.
Drop down the Keyboard list by clicking the +, and select a layout for your language. Some languages offer multiple layouts - e.g. English offers QWERTY or Dvorak, French AZERTY or French Canadian QWERTY, Polish either 214 or Programmers (see description of Polish Keyboard layouts on the next page of instructions).
Click OK.
If you wish to add keyboards for multiple languages, or multiple keyboard layouts for a language, repeat the sequence: click Add, choose from Input Language list, choose from Keyboard Layout list.
Click the Language Bar tab. Choose one of the two options for language bar position. Docked in taskbar is recommended - this will place the keyboard selector at the right of the taskbar, near the clock. You can switch between docked and floating later.
Click OK as many times as necessary to get back to Control Panel.
You may be asked to insert the installation CD or enter the folder location from which you installed.
If you want to use letters from Polish or other Central-European (CE) languages outside of Office documents, or you have a program that shows menus and dialogs in a CE language, perform these steps:
Log into the system as Administrator
Open Control Panel, Regional and Language Options
Click the Administrative tab.
Drop down the list under “Current system locale” and select the language of your choice.
Click OK.
You may be asked to insert the installation CD or enter the folder location from which you installed.
You must restart the system for this change to take effect.
Now, Polish letters will be properly displayed in menus, dialogs, in a Command window, in .TXT files.