I was running the "windows live onecare safety scanner" (which doesn't seem to be particularly safe to me!) on my desktop and when I came back to check on the scan I found the following error message on my black screen:
"Windows could not start because of an error in the software. Please report this problem as: load needed DLLs for kernel. Please contact your support person to report this problem."
XP is not able to boot, not even in safe mode. Every time I start the computer I get the same error message.