Mcafee would not do this. that said in case this an issue I have pinged a tech to comment
Could you please update us with following details.
Type of Intenet connection (DSL, Wireless, Cable, Dialup)
The DAT version and McAfee Build Version on your computer. (you may find these details once you click on about on right top cornner of McAfee Security window) .
Tony's response is correct. McAfee Security applications do not write to CMOS data locations.
I dug around the web and the two applications that I came up with that could write to the BIOS setting locations would include BIOS firmware flashing application and over clocking applications. Both of these applications are main board specific applications due to the unique nature of this data.
I seem to recall some mother board's allowing one to change the boot order dynamically for just the one session by pressing the drive letter while the system boots. I couldn't find documentation for this on the web though.
Thinking about this now, there is one possible explanation that I have witnessed over time. When the CMOS battery gets weak data may be lost and or corrupt. In the past you would notice that the clocks times was wrong and or your hard drive setting were wrong. With online time servers and auto-detection for hard drives these indicators are no longer present. If the system is a few years old this is possible.
Kriz's request for more information could help isolate this issue. Could determine that make and model of the computer and or mother board, any hardware vendor system utilities installed along with the OS versions and post them.
I totally agree with your assessment, but this was the only change made the system before reboot. Also, I didn't perfom any keystrokes that would cause the boot order to change (if that is a BIOS feature on my system).
The PC is a Dell Studio XPS 8100 with an Intel H57 running Windows 7 x64 Home Premium. Internet connection is cable.
Security Center is v11.6, build 11.6.435
Dat version is 6870