Scores of Windows 10 have reported experiencing major problems with their computers after installing a critical security update.
The update, which was quickly pushed out by Microsoft to patch the Meltdown and Spectre security vulnerability discovered last week, has left some users unable to boot up their machines.
The problem appears to be affecting users running computers with AMD Athlon CPUs, the Register reported.
Users have taken to Microsoft’s support forums to complain they are no longer able to start their PCs.
According to users the latest Windows 10 Fall Creators Update, labelled KB4056892, has wreaked havoc with some AMD Athlon systems.
One user reported his PC has is unable to boot and just displays the Windows logo.
AMD CPUs are actually immune to the Meltdown, but are at risk from Spectre, the Register reported. However, patch issued by Microsoft appears to have done more harm than good at this stage.
The Register notes a lack of response to the issue by Microsoft.
The news comes after Apple announced on Monday it was releasing an update to protect its devices from the chip flaw which affects nearly all computers and smartphones made within the past 10 years.
“For our customers’ protection, Apple doesn’t disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available,” the company said on its website.
The update helps to protect iPhone, Mac, Apple TV and Apple Watch.
Apple had also said that there were no known instances of hackers taking advantage of the flaw.