Microsoft is facing additional anti-trust challenges from European regulators, just weeks after the software giant lost a big appeal case against them.

The European Commission has launched new investigations on suspicions that Microsoft has abused dominant market status.

The probes focus on its web browser bundling strategy. The commission is also looking into competition issues with its Office and Outlook productivity software packages.

No new charges have been filed, however. Microsoft insists in a statement that it will fully comply with all legal and court obligations.

Last month, Microsoft lost an appeal in court that would require it to share closely held information about how windows operates with server software. Under the ruling, Microsoft was also required to distribute a copy of Windows without its Windows Media Player.