I posted in another thread as I thought the issues may be similar; looks like they're not so much, so I wanted to post here so as not to hijack that one. When installing, I get error 0X80070002, then on restart I get the Infw error, but instead of 4 I get error code 0. I also just purchased Defensewall version 3, and was trying to find a good non-hips FW to go with it in case of a problem with that firewall. I have in the past had OA and ZA which installed fine. And, each has been cleaned out (to the best of my knowledge- and I cleaned as safely as I could). Never used any other uninstallers except product-related, then CCleaner. All security disabled, Defensewall uninstalled, at LnS installation.