A article from Fortune surfaced just today (12/8), discussing the possible rumor of Bill Gates returning to the helm of Microsoft. According to Fortune a prominent chief executive heard from someone close to Gates that he might be contemplating such a move.

The company's stock price has been a thorn in Ballmer's side for a decade. At the end of 1999, Microsoft's best year for market price, shares were at almost $60. When Ballmer took over as chief executive in January 2000, the stock was still over $50. With the burst of the tech bubble, Microsoft's stock dropped steeply and hovered around $25 area through much of the decade, excepting a short rally above $35 in late-2007 and a dip under $20 during the 2008 financial crisis. Ballmer dumped much of his stock during the decade and Bill Gates gradually left daily operations. (Gates' last full day was in June 2008.) During that time, the stock stayed flat as competitors such as Oracle (ORCL) and Apple (AAPL) saw huge gains in their share price.

Could Gates goose the moribund stock price? Possibly. Any CEO turnover tends to jumpstart improvement in a company's stock price, says Jarrad Harford, finance professor and chair at the University of Washington's Foster School of Business in Seattle. According to Harford, investors anticipate the company's value under new management even before the executive actually takes over. (New CEOs have about a year before his or her imprint needs to be visible to investors.) "There's a lot of frustration among investors with Steve Ballmer," adds Ed Maguire of CLSA Asia-Pacific Markets. "Some is merited, some may not be. But there's certainly a perception that Ballmer is responsible for the under-performance of the stock."

Analysts say that whoever is in charge at Microsoft will face serious headwinds -- even Gates. Under Ballmer, the company picked itself up after the disastrous Windows Vista, launching Windows 7 successfully. Now, it is preparing Windows 8, which the company hopes will launch it into tablets. But it must draw developers to its platforms and duke it out with with Amazon (AMZN), Apple and Google. "There are very few examples of where returning founders had to come from behind in their certain market," warns Kirk Materne of Evercore Partners, which carries out investment banking services for Microsoft. "Gates was great at Microsoft when Microsoft was the dominant player." Even Gates, Materne warns, would face challenges.

Update: AllThingsD.com reports that Larry Cohen, Gates's chief of staff, has officially denied that Gates is thinking about such a move. It's also important to realize that while Gates may not be in in his office at Microsoft every day (he officially stopped working full time in June 2008), he still works part time at the company and still has an influence over Microsoft's business. Indeed, Gates himself admitted that he was a big supporter of Microsoft's $8.5 billion acquisition of Skype earlier this year. He stated at the time, "I was a strong proponent at the board level for the deal being done."