European judges will rule tomorrow in a legal battle that could change the way the world’s biggest computer software company does business.

Microsoft has met its midnight deadline to submit a compromise on its landmark anti-trust case with the European Union and EU regulators will likely assess the proposal for weeks before deciding whether to impose fines, officials said today.

The European Union said its anti-trust regulators might need several weeks to decide whether to slap Microsoft Corp. with huge fines once a midnight deadline on Tuesday for the software maker to comply with a landmark ruling expires.