FORTUNE — There weren’t too many surprises in Dell Inc.’s announcement that it has agreed to be taken private for $24.4 billion. Except for one: Microsoft’s $2 billion investment will come as a loan, instead of as equity.
A source familiar with the situation tells me that the software giant was worried about other customers thinking that Microsoft (MSFT) had incentive to value one over another, so it chose not to take an equity position.
That said, Microsoft also realizes that it may have created a slippery slope. For example, what if another customer requests involvement in a take-private or other sort of financing event? If Microsoft declines, then is clearly would seem to be valuing one customer (Dell) over another.
Seems Microsoft decided that helping Dell (DELL) survive and prosper was worth that latter risk, although it is expected to at least listen to any future requests. Moreover, Dell is unusual in its importance to Microsoft and the broader PC market — with only Hewlett-Packard (HPQ) and Lenovo selling more personal computers.
In a brief statement about its investment, Microsoft said the following:
It also is worth noting that this isn’t the first time Microsoft has worked with Silver Lake Partners, the private equity firm leading Dell’s acquisition. In 2011, Silver Lake sold Skype to Microsoft for $8.5 billion. I’m told the existing relationship was valuable to Microsoft’s participation in the Dell transaction, but was not its genesis.
Sign up for Dan’s daily email newsletter on deals and deal-makers: GetTermSheet.com