Install failed partway through. Can neither install nor uninstall.
I run nearly all the time as a regular user, not Admin, on Windows XP, IE8. I succumbed to the offer to install Yahoo Browser Plus for easier photo upload. Unfortunately the install did not like something or other and bombed partway through. I did not record the error message. Something about a timeout.
Now Browser Plus is partly installed. It periodically asks permission to connect through the Symantec firewall. But there's no Browser Control Panel entry in All Programs, under the user login or the admin login. And there's no entry in Add/Remove Programs under either the user or admin logins. And your website status says it is not installed. So I cannot uninstall it. There are several registry hits for Yahoo Browser Plus, but I am not about to start randomly deleting them without guidance.
So I tried installing again--several times--both as a user and as Admin--with Symantec enabled and disabled. None of the attempts succeeded. The HDD accesses a few times and there's a little ethernet traffic and then it quietly stops, hanging that browser instance.
It appears to me that the programmers are doing something backwards if they are writing Run Once registry keys before the uninstall has completed. What do they expect will happen on a failed install? And the reinstall is not robust if it cannot complete in the presence of a failed install.
And it appears that no one ever bothered to test the cases of an install in user (not admin) mode or an install where one or more transaction was blocked by a lost packet or firewall. You do test it, right?