Microsoft halted delivering latest Windows operating system security update for some AMD based devices after the users report that the update froze their machines with a blue screen of death while booting.
The update contains security patches for most widespread chipset vulnerabilities, Meltdown and Spectre. According to Microsoft, only a small subset of older AMD processors remain blocked to avoid users getting into an unbootable state after installation of recent Windows operating system security updates.
Microsoft added, they are working around the clock to resolve this issue and should resume Windows OS security updates to this subset of AMD processors likely by next week.
Although AMD machines are only vulnerable to Spectre now and its still unclear about Meltdown vulnerabilities affects on machine, so Microsoft is also pushing Meltdown patches along with Spectre fix as a countermeasure to protect against future attacks.
Meltdown and Spectre vulnerabilities are the two massive CPU flaws currently affecting almost all devices powered by Intel, AMD and ARM processors and according to many experts, the fix for these bugs are going to reduce the performance of the devices by 30 percent.