I would recommend you to Scan the system with "eScan AntiVirus and Toolkit Utility" from the below link.
This tool will scan and remove the known viruses and will also detect new suspicious files.
Run/Execute the downloaded file (mwav.exe), Update it by clicking on the "Update" option and then select the below option to start the scan.
"Memory / Services", "Registry", "Startup Folders", "System Folders", "Scan
Spyware", "Drive", "All Local Drives" , "Scan All files" and "Scan & Clean".
Do restart the pc and let me have your feedback.
And if the problem doesn't resolves. then search for MWAV.LOG file and paste the content of that log here.