O

OAR. See Owner Access Restriction

objects, 171. See also securable objects; specific objects

Office Live Communicator, 214

OneCare. See Windows Live OneCare subscription service

Open files based on content, not file extension (setting), 274, 280

Opera, 246

vulnerabilities v. market share, 247

operating system (OS)

files, 184

Trusted Installer and, 184

Group Policy and upgrade/rollout strategy, 515-516

IIS

hardening, 337-339

web server services, 337-339

misconfiguration, 56-57

vulnerabilities, 54-56

web server, 295

OS. See operating system

OS kernel, Vista, 7, 75

outbound filtering, Windows Firewall and, 412-417, 525

Outlook Express, 31. See also Windows Mail

Owner Access Restriction (OAR), 24

OWNER RIGHTS, 182-183, 201

SID, 182-183