The law you're mentioning is the “Digital Markets Act”, and it's a new law that will apply to Google, Apple, Amazon, Samsung and others, not having to do with any enforcement of “antitrust” laws upon Microsoft.
https://commission.europa.eu/strategy-and-policy/priorities-...
Furthermore, are we talking about the same Microsoft that:
1. forced usage of Microsoft Edge, while also actively blocking circumvention mechanisms;
2. that keeps hijacking searches for Chrome, or Firefox;
3. that has telemetry in Edge that can't be disabled;
4. and that, upon first opening Edge, it asks you to agree to data sharing with the entire advertising industry?
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You basically assert that Google is receiving preferential treatment from the EU, yet provided absolutely no evidence for it.