Is it ePO 4.0 or 4.5 that you're installing?
Its EPO 4.0. No patches just the initial install.
OK - pardon the question, but have you tried 4.5? 4.0 is getting a bit long in the tooth and the 4.5 install may succeed where the 4.0 install fails...
Failing that, if the install is still running, then check for the epo400-install-msi.log - this should tell you what the installer is doing. The last entry will gve us an idea of what's happening.
I haven't tried 4.5 and wasn't going too as its only a temporary solution, although its still urgent to get done. I have tried to look for those logs and have been unable to find them, although I did have some logs appearing when I used another admin account. I will try this and get back to you.
I managed to get the installation to complete last night and get past the Installing Product Extensions bit. This unfortunately meant that I had to KILL the Java service twice and then the installation completed. I can get into EPO4 and all looks like its working, except for when I go to the extensions section and look at VIRUSSCAN8000 & VIRUSSCAN8600, as these were the two that hung. It says its trying to install the extension for these but seems to be doing nothing. I have tried to delete the extension which brings up an error saying it cannot do it. I have also tried to install the extension over the top of the old one and this has brought up an error saying that an extension of the same name is already being installed.
I am not going to be using 8.0 or 8.5, but not too fond of the fact the EPO console is still trying to update these extensions.
Any help appreciated.