Downloaded MBAM today. Installed on a vista (known clean) machine, tested everything well. Installed on an XP (known infected) machine. Not so well. Installation and update went fine. Can navigate the UI and change settings. On starting a scan, timer ticks up Object Count does not go up. After about ~ 15 seconds MBAM just disappears. On trying to restart from the Start menu (or desktop icon) I get "windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item." If I try to run from command line, all I get is "access denied" I am logged as the administrator for this machine. I have AVG anti-virus, have added the MBAM path to the exclusion list. Things I have tried to date: 1. Quickscan first: Fail, can't restart, re-install 2. Full scan fist: Fail, can't restart, re-install 3. Repeat above without database update first after install: Fail, can't restart, re-install 4. Repeat above from command line:Fail, can't restart, re-install 5. All of the above in safe mode: Fail I'm probably not the fist to run into this, but searches on the forum did not turn up anything useful. XP is on SP3 and up to date. AVG is probably not a factor, since the behaviour is the same in safe mode, but is up to date. Help!!!!?