What MAC said is correct.
Close the opera browser before uninstalling.
Just uninstall it and use any registry cleaner to clean your registry…after the cleaning,go to where opera was installed and see if the folder is still there and delete it….it should be in “Program file” unless you changed the destination when it was installing.
Note:-you can access the the program files folder from My computer>>>Local Disk>>>>then program files.

I use Opera, and have NEVER had a problem with it. Do you use programs like Ad-Aware, SpyBot, and a good anti-Virus program? It is possible you have some malware on your computer. A complete re-install should have worked fine..??

go to add or remove programme & click on repair or open opera 9.0 click on about then on repair or install it

first uninstall it and clear your registry files also and the try reinstalling

best of luck

update it!!!!!!!!!!!!!!!