It appears there's a macro file set to run when you boot the system. If you
did not create this file yourself, you may have a macro virus. Be sure your
antivirus software is up to date and run a scan of your system. NOTE: it's
not enough to simple update and use your antivirus as a gateway. A virus
can get through in the interim before a new definition has arrived. Hence,
you need to be proactive and run frequent scans as well to be sure you're
clear of viruses.
Also, download, install and run Ad Aware as this might be a file set to run
by some freeware or shareware you might have installed, wittingly or
unwittingly:
www.lavasoftusa.com