I got this "error1720"which I would like to fix . This is first step cos' I cannot go very much in depth.

Hi Raymond Xuereb,- When exactly do you get this error message?- What’s the exact and complete error message?Window Installer Error 1720 happens because Windows installer is unable launch the relevant source files for the setup of the application software that you are trying to install. Those files may be missing or corrupted.Method 1: Try to restart the Windows Installer service and check if that helps. Try logging to an administrator account and follow these steps to do the same:a. Click Start, click Run, type services.msc, and then click OK.b. Right click Windows Installer Service. Click Stop.c. Restart the computer and again follow the step to open Services. Double click the Windows Installer Service. If you receive a Configuration Manager message, clickOK.d. In the Startup Type list, click Automatic, and then click OK.e. Close Services.f. Restart the computer.Method 2: Try installing the latest version of Windows Installer and check.Windows Installer 4.5 Redistributable Regards,Divya R – Microsoft Support.Visit our Microsoft Answers Feedback Forum and let us know what you think.