For some reason today my machine (XP SP3) will only use IE as my default browser. In chrome, when I click make chrome default, nothing happens. In firefox when I click the check now button firefox always tells me it's not the default.
I've also tried setting a default via the set program access and defaults control panel option, but this also seems to get overwritten each and every time I try it.
I am in the local administrators group and everything was fine yesterday. I also don't recall installing anything yesterday.
I'm at a bit of a loss where else to look.