You have an incomplete install/uninstall. Empty out your \windows\temp folder and check your startup tab in msconfig. _delis is a remnant of Installshield. Answerworks appears to be a tool for developing help systems/files.
Go get a free online scan at
http://housecall.antivirus.com and if you need a decent FREE antivirus, go look at AVG from
www.grisoft.com .