On Tuesday, Microsoft is scheduled to released eight security patches for their Windows Operating Systems and their softwares. They posted that they will release eight patches on their website but they removed four out of eight bulletins.

Three of them have an “important” rating and one is rated as “critical”.

No exact reason were given on why they pulled out the four patches but a spokesman said “There are many factors that impact the release of a security update, and every vulnerability presents its own unique challenges.”

The four remaining patches will be released.