A 5 second or so effort spent typing the name into Google to see what comes up would have yielded the following:
" WUAUBoot.exe is process managing automatic updates for Windows. The process check for online updates after boot-up."
So basically something having to do with your automatic updates is messed up, which sounds like it might be the work of spyware or possibly some sort of virus/worm. There's also a chance it's the first major sign that your OS install has gotten corrupt, and will need to be redone soon. So... What do you do to prevent against spyware, viruses, etc?
I've been asking around if someone has heard of something called WUAUBOOT (not a typo) appearing periodically on my ME Edition system with a dire message, reading as follows -
"Wuauboot caused an error in <unknown>. Wuauboot will now close. If you experience problems, try restarting your computer."
There's also a large yellow and black apostrophe symbol on the upper left hand corner. Anybody out there ever seen this thing??? 'preciate your input.