Your issue may have been related to an audio driver that was updated. Driver changes like this can be rolled back and previoius system settings restored from within the application. In addtion, the PC Matic interface clearly offers an option to opt out of driver updates.
If you would like to provide more detailed information regarding your specific issue - we would be happy to investigate.
Multiple 3rd party sites and services have independently verified that PC Matic is safe to download.
The 42 Antivirus/Antimalware software vendors included in the Virus Total scan recognize the PC Matic as safe.