On Friday morning Microsoft (Nasdaq: MSFT) announced that longtime CEO Steve Ballmer would be retiring from the company within the next 12 months. While Bill Gates will always be the company's iconic founder and former CEO, Ballmer has led the company across the past 13 years.

Ballmer's legacy is a mixed-bag. On one hand, profitability sharply increased during his time as CEO, yet the company has also seen its share of blunders across the past decade and is badly trailing both Apple and Google in both tablet and smartphone adoption. 

To see a full run-down of some of Ballmer's biggest blunders, just click on the slideshow below. Also, if you're looking for more information on the battle between Microsoft, Apple, Google, and other major tech giants, we've created a free report called "Who Will Win the War Between the 5 Biggest Tech Stocks?"To grab a copy of this report, simply click here -- it's free!

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.