But while Microsoft 's share of the low-end server software market has increased since the EU 's investigation started five years ago , the firm has denied anti-competitive practices are to blame .
Microsoft 's share of the low-end server software market has increased since the probe started five years ago , but the firm denied anti-competitive practices were the reason for this .
Microsoft shares, traded on the Nasdaq, fell a penny to close at $25.65 today.