Running the application invoke the window with its basic settings. This can be done via menu - click on the corresponding button in the browser window to expand it, go to "Settings" and select the top row - "General settings". If you prefer keyboard shortcuts to travel through menus, just hit Ctrl + F12.
The browser manufacturers believe that the function of AutoUpdate applies to the settings security find the section with the same name in the list, is placed on the "Advanced" tab of the settings window of the application. Turning to this section, open the drop-down list next to "Update Opera".
Depending on the reasons you want to disable autoupdate, select one of the options list. Choose the "Ask before installing" will cause the browser when a new version is on the server of the manufacturer to show the window with the question whether it should be downloaded and installed. Another point - "do Not check" - will leave you and browser in the dark about the release of future updates.
After making your selection, click OK, and Opera will take to the performance of your new policy.
If for some reason you are not able to disable the automatic update by the browser itself, you can mislead him - to change the address at which Opera checks for new versions, putting in his place a "cap". It can be done, for example, using the hosts file. Find it in the Windows system folder at System32driversetc. To make changes to this file by using any text editor - for example, the standard Notepad of Windows.
Open hosts and add at the end of the list of existing entries the following line:127.0.0.1 autoupdate.opera.com
To avoid problems with the rights to edit the system objects, rename the original hosts, e.g. to hosts.old, and only after that save open in the editor file as Appendix.