Well, at least I'm not the only one!!! My lockups were on my laptop with a fresh win 8.1 install and then the update. I've just done a clean install having downloaded windows 10 home onto a usb stick. formatted the ssd prior to the install and today when installing programs and doing a little reading, 3 lockups in an hour, which is a record so far. usually it's one or two. if this keeps up i may just pull out an old win7 oem and install it on the laptop. this is worse than the previews i had run the last year. i had shutdown issues with the preview but no lockups until the rtm release. no shutdown issues, but the lockups started. thought the full release would solve this, but no. this probably shouldn't have been released until at least december. thanks ms!!! had to install my firewall 3 times before it showed up. i've used system explorer to see what could be causing this as far as odd programs running in the background, but have come up empty. oh yeah, updates are a total mystery. some install, some don't, sometimes it says it couldn't install an update, but tells me the computer is up to date. go figure. not going on my desktop until next spring! have fun folks!