Server infected with virus

guys....my office server has been infected...so help me...how can i remove those viruses????????I also need important data

Take the server off the network immediately. Copy/backup whatever data you need to save. Remove the malware, I recommend a complete operating system re-install to ensure you're gotten rid of the malware. Restore the backed-up data, being careful to scan for virus before restoring so you don't re-introduce malware on the machine.

Is there any others ways to remove the viruses from network?

You can remove virus by installing comodo antivirus softwares