The Opera browser can be updated by going to the About Opera section and immediately checks to see if the current version used is current, similar to what Avast software checker does under the protection tab, however just recently when using the About Opera instead of saying up-to-date it brings up An error occurred while checking for updates, no solutions would help until I hit the ignore for Opera browser in Avast, and now it doesn't give the error.
Perhaps it is coincidence but could the two programs be related with this?
I use the most current browsers and software.