install of 3-8 or 3-10 into 'ether'

The installation of both 3-8 & 3-10 failed = nothing happened!
no error messages, nothing.

I did not have an antivirus program installed [free avg].
I have XP-Pro with SP2 installed – for sometime.

I can load 3-0-25-378, & updated that just now [had to use IE, not Firefox].