nasty

hi since long time i have this file in windows/temp and so many times i have deleted that but again and again i have seen same file in same folder...... some softys referring this file as possibly nasty and process explorer unable to give me any reference on google ..i m getting...

Please give me some names of softwares that can be used to convert from wma to mp3. I must have downloaded half a dozen by now but each one has got it own set of nasty comments and this prevents me from getting the task done. I have even tried searching the forum but to no avail. Thanks