" Even though testing procedures have been improved, mistakes still occur: mostly because the volume of signature definition updates has shot through the roof over the last decade in parallel with the boom in Windows malware."
Stop being an apologist for the A/V industry!
There is NO excuse for ANY signature update to flag STANDARD Operating System files, NO excuse at all. How many variations of Windows are there? Frankly, a handful, it can't take a significant amount of time for these people to TEST EVERY UPDATE on currently-supported O/Ses at the very least.
Sure, it's probably unreasonable for them to check their updates against every third-party driver but nearly all these kinds of reports are dealing with standard Windows DLLs etc..