Missing software and file drivers is often a leading cause of STO file problems. It is highly recommended that you scan your PC using the STO File Repair Tool. It will analyze your files and make sure you have the necessary file openers.
STO file error symptoms can include the inability to open STO files, program lock-ups, crashes, slow PC performance, startup and shut down problems, and installation errors.
Fixing the Problem
To ensure STO files can be opened and read by your computer, download and run the STO File Repair Tool. Simply click the button below to download the software.