According to Reuters, the complaint asks the Commission to broaden its ongoing investigation into Google. The EU is investigating whether Google is too dominant in the web search market.
Microsoft spokesperson Jesse Verstraete said Microsoft had not filed a complaint with the Commission yet, but Reuters appears to have its own deep throats which suggest that something is being cooked up.
Microsoft has already made formal complaints to EU regulators about Google on two other anti-trust problems in the past year, so Google+ is just another brick in the wall.
Last month, the US FTC expanded its investigation of the company’s search activities to include Google+. EU Competition Commissioner Joaquin Almunia said he would decide by the end of March or early April if he was going to do anything similar.
But he did say that he was still getting complaints about Google’s antics and it was not a simple thing to investigate.