why Avast! not respond to it very well?
I am from China
They would require a sample for analysis, if you have one, send the sample to virus@avast.com zipped and password protected with the password in email body, a link to this topic might help and undetected malware in the subject.
Or you can also add the file to the User Files (File, Add) section of the avast chest (if it isn’t already there) where it can do no harm and send it from there (select the file, right click, email to Alwil Software). No need to zip and PW protect when the sample is sent from chest. A copy of the file/s will remain in the original location, so any further action you take can remove that.
Information about msrs.exe :
Do you use any type of recording software? Read here …
http://www.prevx.com/filenames/X4054429152893745799-0/MSRS.EXE.html
http://wakoopa.com/software/msrs-recording-system
This exe is also associated with a trojan dropper …
http://www.bleepingcomputer.com/startups/msrs.exe-21745.html
http://www.sophos.com/security/analyses/viruses-and-spyware/trojdroppertn.html
This exe is also known as msbj.exe and associated with W32/Feebs as shown here …
http://www.threatexpert.com/files/msbj.exe.html