I’ve long adored Sysinternals’ Windows tools. They are hands-down the most technically advanced Windows system tools around, and they are free. What I didn’t know was that Sysinternals’ Mark Russinovich has a blog. His latest post, Sony, Rootkits and Digital Rights Management Gone Too Far, is a fascinating piece of detective work through some pretty deep Windows internals, reverse-engineering an irresponsible and intrusive bit of Sony digital rights management code.