My Norton Antivirus blocked the installation of the update .... says :

When the program is executed, it creates the following files:

• %SystemDrive%\Document and Settings\Default user\Application Data\6978C0F1796A4924B0DC69EA966F4F44\du.exe
• %SystemDrive%\Document and Settings\Default user\Application Data\6978C0F1796A4924B0DC69EA966F4F44\setup0123.exe

The program includes offers for additional third-party applications

during the installation process of legitimate applications.