Good Registry maintenance and monitoring.
HDD maintenance tools are part of Windows OS, but without SM Pro, who'd think to use them on a regular basis.
Biggest gripe - Complete ineffectiveness of teh Anti-Virus. Next biggest is the Iolo adware pop-up. I advertises Iolo's stuff I already use. This is just plain STUPID!
I'm looking for similar replacement product. I think Microsoft should be able to build something.