Re: BES Admin page not available
disabling antivirus or firewall for testing purposes is the first thing I do if somehting does not run as expected. You never know which ports and services are used by an unknown/new software.
If afterwards the problem is solved you can of course enable it again.
The last option (install from scratch) is something I also do not like very much. However it helps to stop waisting time if there are no other options which can help in a realistic timeframe.
If you want to uninstall BES, its up to you - go ahead.