since you're on Windows do you know if you're logged in as an administrator? Which version of Absinthe are you trying to run? are you doing it from work? I know when I tried a long time ago to run a JB from work it didn't work and when I got home it was fine so I chalked it up to firewall at work. I'm thinking this is a permissions issue though when you're going to run Absinthe right click it and choose run as administrator if it asks for a password enter yours if that doesn't work then most likely you're not an admin. You could also tried the tested Windows fix reboot.