Have you googled these http://www.google.com/search?lr=&ie=UTF-8&oe=UTF-8&q=Win32.reboot
http://www.google.com/search?lr=&ie=UTF-8&oe=UTF-8&q=Back%20Orifice there is quite a lot of information.

Perhaps it’s time to look at your backup strategy and purchase some Imaging software, so if things get so screwed up you just restore the last image, time taken 10-15 minutes.

I create a backup image once a week and do a daily backup of data files (word docs, excel, any volatile data), email files, bokmarks and addressbook, etc. After restoring the backup image I then restore the data backup.

I use Drive Image 2002, a bit long in the tooth, but it does the job. There are others, Ghost, etc. the only one I wouldn’t recommend is True Image, my friend had nothing but trouble with it. He couldn’t get it to restore images reliably, in the end he bought Drive Image 7 via ebay and is very happy now.