The Russian government is exploring whether Microsoft deserves closer scrutiny under its antitrust laws, specifically whether the software maker should be added to a government-maintained list of companies with high market share. Being added to the list itself doesn't mean the company is under investigation, but rather that it must comply with laws governing firms that have a significant market share. Russia starts keeping an eye on companies with even a relatively low share. Anything upwards of about 35 percent share could land a company on the list.

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