A survey of applications installed on Windows computers found that a lot of users don’t run up-to-date versions of Apple programs.

Apple’s multimedia program, QuickTime, and its iTunes software were ranked as some of the most “exposed” programs based on risk by Secunia Research, which is now part of Flexera Software.

Among U.S. users, some 61 percent of computers detected running QuickTime did not have the latest version. With iTunes, 47 percent of the installations were outdated versions.

It’s not Apple’s fault. Although many software companies alert users to new versions of applications, it’s largely up to users to install them.

The data was collected between October 2014 through last month from computers running Flexera’s Personal Software Inspector, a free tool that checks if all applications are up to date. About 8 million computers have the tool installed.

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