"When you install Internet Explorer 9 on a system that has Windows 7 RTM installed, additional operating system components are included as part of the installation of Internet Explorer 9," Microsoft says. "When you install Internet Explorer 9 on a system that has Windows 7 SP1 installed, these additional components are already present with Windows 7 SP1, and do not need to be reinstalled when you install Internet Explorer 9. For this reason, a system reboot is not required when you install Internet Explorer 9 on a system that has Windows 7 SP1 installed."
Microsoft's IE9 FAQ says enterprises should not wait for IE9 to deploy Windows 7. Instead, they should move forward with Windows 7 deployments with Internet Explorer 8 and upgrade to IE9 when it is ready.
Windows 7 deployments are happening rapidly, with market share now at nearly 16%, ahead of the market share for Windows Vista. However, Windows XP is still the most widely used operating system, with nearly 61% of the market.Microsoft also has the most widely used browser, with 60% of users on Internet Explorer, according to Net Applications.
Read more about software in Network World's Software section.