Microsoft has scrapped this month's security patch, which was due to be released last week, after unspecified patch quality issues.
The company had planned to release at least one fix for its Windows operating system that was believed to be "critical". However, Microsoft said its security team needed to conduct further tests on the fix before it was released.
The company has been releasing security updates on the second Tuesday of each month since last year, a date that has become known as "patch Tuesday".
Last month, Microsoft had to re-issue a fix for a flaw in the Internet Explorer browser, when it was discovered shortly after its release that the fix contained a flaw that prevented users from installing it.
It is not clear when the next security update will be released, but the company could release it before its next scheduled patch on Tuesday 11 October.