When i try to install solidworks 2014-2015 on my laptop the intalation manager says

This file that is required for installation is corrupt: common0.cab.

The file might have become corrupted during a download or when reading from a source directory. Delete the source directory and then rerun Installation Manager to download the files again.

And when i press ok to this message anoter message pops up saying

Internal error: The Windows Installer for this product component did not run as expected: InstallExecute.

Contact Technical Support.

and then when i press ok to that message it says instalation failed.