Microsoft (NASDAQ:MSFT) has a problem.

Windows 8 hasn't been the PC industry savior that many were hoping that it would be. Sure, the software giant recently announced that 100 million Windows 8 licenses have been sold, but actual sales of desktops and laptops tell us a different story. PC sales have fallen sharply during the first two quarters of Windows 8 availability.

The last time that Microsoft put out an unpopular operating system, Apple (NASDAQ:AAPL) jumped on the opportunity to roll out the famous "I'm a Mac" ads that took shot after shot at Vista. With soft PC sales and user complaints mounting for Windows 8, why aren't Apple or Google (NASDAQ:GOOGL) trying to ramp up the damage by rolling out attack ads?

If anything, the surprise here is that it was Microsoft that put out an attack ad taking punches at Apple's iOS and Google's Android last month. 

In this video, longtime Fool contributor Rick Munarriz wonders why no one has stepped up to kick Microsoft while it's down -- and why someone should do so before Mr. Softy gets back up.