Microsoft reveals how Spectre updates can slow your PC down

Microsoft is taking the surprise step of detailing how Spectre and Meltdown firmware updates may affect PC performance. The tech industry has been scrambling to issue updates to protect against two CPU security flaws over the past week, and there have been many reports of potential performance issues. The good news is that for modern PCs running Windows 10, most consumers won’t notice a significant difference. If you’re on an older machine, particularly a Windows 7 or Windows 8 one, then there’s going to be some noticeable performance changes.

It appears that Intel Haswell processors and anything older will be impacted the most by a series of firmware updates designed to protect against the Spectre CPU security flaw. Intel has been...

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