McAfee apologizes for “any impact the faulty signature update file may have caused you and your organizations” “We recently made a change to our QA [quality assurance] environment that resulted in a faulty DAT making its way out of our test environment and onto customer systems,” McAfee says. McAfee is adding what McAfee calls “additional QA protocols” to any updates that may impact critical Windows system files. Reports put the number of affected PCs in the thousands, the majority of them in businesses.”]
Source: https://www.csoonline.com/article/2125107/mcafee-apologizes-for-bad-update.html