I don't DL much and am generally careful... So yeah. I've backed up stuff recently because of that as well, but I'm not pissing with a reinstall and stuff. I'd like to jump right into 10 but I'm reluctant because MS is MS, and MS likes to put out product riddled with tech crabs.
BTW, not a huge mac guy, just know I've been down buggy update lane before. And to have one, a security one that was important and all, do this right before the 10 update? Yeah, kinda ****** timing to sour me and make me nervous.
I didn't like "new" Windows either... The kids have it on their gaming rig, which as the family's IT guy, I f'n hate to fix. Between them screwing things up on their own, and using an OS I just didn't dig, I hate it.