Some users reported difficulties in installing (unzipping) the downloaded installation files (i.e. when double clicking on a downloaded file nothing happens)
1. Disable any Anti-virus program you may be running
2. Try the following:
Right click on the downloaded file i.e. T1Full04.exe instead of double clicking on it.
Then click on the 'Extract to' item of the pop-up list*
Then in the 'Extract to' box enter C:\Temp and then click the Extract button then close the window.
Then use Start | Run and enter C:\Temp\SetUp.EXE
use the Explorer and find C:\Temp and double click on the SetUp.EXE
* If the pop-up does not display an 'Extract to' item then you need to
download and install WINZIP from www.winzip.com