hi there, one thing id have a look at, is if theres anything like a firewall or antivirus running, as its normally something like that disagrees with the install process, so id have a look at turning all that off to install (dont forget to turn it back on afterwards)
i also remember there used to be some other program that was running that would do that, but cant for the life of me remember what it was called, but think it was something to do with pictures or images, but maybe someone else might recall the exact program, but i know it had to be disabled to install