To unistall the browser open settings>system>remove programs, select the opera file and click remove. For the memory issue, if you have the x button (task manager on home screen in upper right corner) click that then the wrench for settings. go to the button tab and set it to close programs when x is clicked. 6800's dont have much memory at all so if you arent closing programs fully it will run out of ram fast. If all programs are closed and you still have the problem I would suggest backing it up and doing a hard reset. I never had an issue like that when I had a mogul.