File extension SIS (.SIS) information

If Windows is unable to open SIS files you may not have the appropriate program installed or may have a registry related error. We strongly recommend that you run a free registry scan.

Appropriate program:

The .SIS extension identifies an installer application used for Symbian operating systems. The Symbian operating system is used by a range of mobile devices and hence could be associated any one of a large number of brands of mobile phone.. Incorrect associations are the cause of many file extension errors. Scan your system to prevent and identify association errors.

• Performance: To optimize memory and CPU usage for SIS files run a free performance scan.
• Stability: Fix SIS errors to make your system and applications more stable.
• Drivers: Scan your PC for the outdated drivers which lead to system errors and slowdowns.