Ars Technica reports that Microsoft's role in Dell's leveraged buyout has reached a "sticking point" in negotiations. The company reportedly wants more than just an investment in return for the $2 billion it's sinking into the buyout deal. The Redmond company also wants a say in how the company will be run.

"Under one scenario being discussed, Dell would agree to use Microsoft's Windows software to power the vast majority of its devices," one source said.

Dell is already one of Microsoft's biggest Windows-based clients, but the Redmond company may be looking to prevent Dell from making a "radical" reorganization, or to prevent Dell from departing from the PC market. The problem is that Dell reportedly wants to go private so that it can break away from depending on PC sales, and to alter the way it conducts its business.

News of Microsoft's interest in Dell surfaced last week. Unnamed sources told CNBC's David Faber that Microsoft was in talks with Silver Lake, the main sponsor behind the leveraged buyout, and Michael Dell who are currently working on the deal to go private. Faber said Microsoft's investment would be "mezzanine" financing, or rather debt that converts into equity if the debt isn't paid back within a specific timeframe.

Even last week, it was obvious that Microsoft's involvement could hamper Dell's intent to "reinvent" itself by going private. But despite Microsoft's "sticking point", the deal between Michael Dell, Silver Lake and the special committee formed by Dell shareholders is supposedly on track. A formal announcement is expected to be made within the next few days.