I have recommended downloading and configuring the Imprudence viewer. However, it is possible to connect to Viradu using a SecondLife viewer on a Windows computer which can be downloaded and configured to login to Viradu by making a copy of the desktop icon and adding a few parameters.  Here are instructions (assuming Windows 7) for doing just that:

1.  Download and install the SecondLife viewer (if you haven't already).

2.  Right click the SecondLife viewer icon on your desktop and select Copy.

3.  Somewhere else on the desktop, right click and select Paste.

4. Again, right click on the copied icon and select Properties.

5.  Under the Shortcut tab, find the Target: input field.  Click in it and forward the cursor to the end of the line.  Now add one space and copy this text below into the field at the end of the line:

-loginuri http://71.6.158.83:9000 -loginpage http://71.6.158.83:9000/wifi/welcome.html

6.  When you are done with step 5 above, the entire line should now look something like this below (depending on where you originally installed the viewer):

"C:\Program Files\SecondLifeViewer2\SecondLife.exe"  --set InstallLanguage en -loginuri http://71.6.158.83:9000 -loginpage http://71.6.158.83:9000/wifi/welcome.html

7.  Now click Apply and OK buttons, you should now be able to launch the icon to run the viewer and login to Viradu, after you have Registered and created a new account here.

Good Luck!