Learn you could install an application from the website instead of from the Android app market.
Not all Android application are available through the Android market so sometimes you will need to install it through another source. You must enable the Unknow Sources option from the Application Settings if you want to install app from the web. Here's how:
1. Go back to the Home screen by pressing the Home button.
2. Now go to Settings.
3. Then select Applications.
4. Then select Unknow sources if the checkbox is not already ticked. Ensure that the checkbox has a tick mark.
5. Tap on the OK button if the Attention box appears.
5. Now go back to the Home screen and select Application List.
6. Select Internet.
7. Now you can search and download the app you wish to installed.