Avast says the file is 44968328. I don't know how big that is, is it to big to send. I will wait for your response thank you.
That would work out at 43.9MB as the figure given is 44968328 bits divide by 1024 for KB 43,914KB. So it is quite large, over the 10MB limit for virustotal or Jotti.
Does the size appear correct, if you recall how it got on your system as it is unlikely to have been a drive by download ?
What is the infected file name, where was it found e.g. (C:\windows\system32\infected-file-name.xxx) ?
Check the avast! Log Viewer (right click the avast 'a' icon), Warning section, this contains information on all avast detections.
The Location and file name might jog your memory as to what it was and if the size is about right.