On a Unity 4.0.4 sr1, it appears to be exhibiting the signs of Microsoft bug found at this site http://support.microsoft.com/kb/265829/ (that is, the SA page is not coming up, the Control Panel doesn't comeup properly). For a fix, I will need to boot it in to safe mode and let the Services, browser, etc. update, then restart the computer normally. Are there any issues with safe mode affecting the Unity application? Thanks.