It's not the first false positive from AVG - one of the reasons, I don't recommend it anymore.
sysinfo.org web site has been out there for ever, and it's probably the very first site, which started to list startups.
If you look at copyright note, you'll see a whole bunch of computer world icons:
Copyright
Presentation, format & comments Copyright © 2001 - 2009 Paul Collins
Portions Copyright © Peter Forrest, Denny Denham, Sylvain Prevost, Tony Klein, CastleCops & Bleeping Computer
Database creation and support by Patrick Kolla
Software support by John Mayer
In any case, the site is 100% safe, and you better ask AVG to do their homework.