Go to http://www.siyabas.lk click the "Get Sinhala" Link on the top of the Page. you will get forwarded to Sinhala Download Page.
Click on the Link "Windows Vista"
Click on "http://www.siyabas.lk/files/VistaQuickFix.exe" and download the VistaQuickFix.exe
Select "Save" when the System prompt you.
System will ask you to select a location to save the file, i have selected the default download location, just click "Save"
File will get downloaded, please allow some time; once the download is finished, click "Close"
Now you need to go to the place where you have save the file to, if you have save the file in the default download location, go to "Start –> Your User Name"
you will see the "VistaQuickFix.exe" file on the download folder. double click the file and open it.
You will see a Security Wanning asking your authorization to open the file, just say "Run".
There will be a security Alert saying the file is not from a verified source, please say "Allow".
Setup will start automatically.
Click "Next" to continue.
Setup will ask you to select the installation directory, just click "Next"; it will get installed in the default program directory.
Setup will do the installation.
If all went successfully, the system will alert saying the Installation successful. click "OK".
On your talk bar where you "Clock" is you will see a red color icon with Sinhala letter "V" (වී); and "EN" icon, click on the "EN" icon and you will see a menu like below and click "Sinhala" when you want to type in Sinhala.