Thanks for the last 2 replies.

I think the problem has been solved. A friend suggested I do a "system restore" to an earlier date and now Opera is running OK and I don't get the yellow/blue shield on the Opera icon and it's installed fine.

One problem still though is that any programs I now download have the blue/yellow shield on the icons and instead of being able to just click on them to open I get the "do you want to allow this program to make changes to your computer" message!!

I'm not 100% sure CCleaner had anything to do with the Opera installation problems, it may just have been a coincidence that the Opera problems started right away. But as you suggest I get a feeling a deleted some sort of file by mistake when I ran the CCleaner (which I've now removed from my PC).

To answer your questions - yes, when I've tried to reinstall Opera, CCleaner has not even been on my PC because I uninstalled it.

The red Opera icon with the blue/yellow shield is on my desktop and also as a shortcut on my Taskbar. Opera put them in those places when I reinstalled it.

I am installing Opera on my personal PC so I have all the privileges and I am installing Opera into the default folder it suggests when I install.

Just as an aside - when I installed malwarebytes I was able to install and run it but the malwarebytes icon also has the blue/yellow shield and every time I double click it, it says "do you want to allow the following program to make changes to this computer?" message. The only difference between that and Opera is that when I double click the Opera icon and say yes to the message it doesn't load but just keeps hanging there and the browser never opens.

Thanks for the reply.

I downloaded CCleaner from piriform.com and I downloaded the free version.

I got my Opera browser from Opera.com and chose the download near the top in the green button that says "download now" which I presume is the latest version. The file is 33.0.1990.115

Someone with a similar problem was advised to install and run malwarebytes so I did that and also ran a virus scan using AVG.

I'm not a techie and have quite an old PC but keep all the software updated via the Microsoft updates. I have an Acer Aspire X3400 PC with Windows 7 Home Premium and an AMD Athlom (tm) II x 2 220 Processor running at 2.8 GHz.

Thanks

An IT colleague at work suggested I download CCleaner to clean up my hard drive so I did. I ran the program and when a list of files came up that it suggested I delete I was very careful not to check anything that I wasn't sure of in case I deleted anything by mistake. Not sure if installing CCleaner has caused the problem below but the Opera problems started straight after (although it may have been a coincidence).

So, next time I try using the internet with my Opera browser it just doesn't work. So I uninstalled it and installed it again and this is where the problems started.

When Opera installed it had the red Opera symbol but with a blue & yellow shield on the bottom right. So when I click on Opera it says "do you want to allow the following program to make changes to this computer?" I click on 'Yes' but then nothing happens. Opera just sits there trying to open and it just keeps saying "loading ...."

If I then close Opera and double click on the Opera icon again I get the same messaqe. Even when uninstalling Opera and installing it again I still get the same problem. So I'm just going round and round in the same loop.

Any suggestions please? Does CCleaner have anything to do with it? Sorry if I've not followed protocal, this is my first post!