Microsoft is making a last-ditch effort to convince government regulators that they need to crack down on Google to preserve competition on the Internet and in smartphone markets.

Microsoft (Nasdaq: MSFT) laid out its arguments in a blog post Wednesday by Dave Heiner, the software maker’s deputy general counsel.

“We continue to be dogged by an issue we had hoped would be resolved by now: Google continues to prevent Microsoft from offering consumers a fully featured YouTube app for the Windows Phone,” Heiner wrote.

Heiner mostly rehashed familiar ground while depicting Google Inc. as a company that has abused its dominance of Internet search and leadership in online video to thwart its rivals to the detriment of consumers.

“Two years ago, Microsoft applauded the U.S. Federal Trade Commission and the European Commission when they opened their antitrust investigations into Google’s business practices. We believed then, as we do now, that the future of competition in search is at stake in these investigations,” he wrote.

“This is important not just for Microsoft, but for the thousands of smaller companies whose businesses depend on a competitive search marketplace. That is why so many companies have made their concerns about Google’s misconduct known to regulators on both sides of the Atlantic.”

Microsoft Corp. lobbed its lasted missive as regulators in the U.S. and Europe wrap up wide-ranging investigations into Google’s business practices.

After extensive negotiations with Google executives, resolutions of the probes are expected soon.

Microsoft is worried Google will reach settlements that won’t require major changes.