Avast! Pro Antivirus & Internet Security & Premier 2016

Avast 2016: Installing Avast Pro Antivirus
How to Install Avast Pro Antivirus 2016

Before you begin make sure you are logged into Windows with administrator permissions, no other programs are running in Windows, and any other antivirus software is fully uninstalled.

Minimum system needed :

Windows 10 except Mobile and IoT Core Edition (32 or 64-bit); Windows 8.1 except RT and Starter Edition (32 or 64-bit); Windows 8 except RT and Starter Edition (32 or 64-bit); Windows 7 SP1 or higher, any Edition (32 or 64-bit); Windows Vista SP2 or higher, except Starter Edition (32 or 64-bit); Windows XP SP3, any Edition
Windows fully compatible PC with Intel Pentium 4 / AMD Athlon 64 processor or above (must support SSE2 instructions)
256 MB RAM or above
2 GB free space on the hard disk

Important

Internet connection is needed to download, activate and maintain updates of the program and antivirus database.
Optimally standard screen resolution not less than 800 x 600 pixels is recommended.
Avast Pro Antivirus 2016 is not supported on Microsoft Windows Server operating systems, or any operating systems which are not specified.