This is very unusual, not maybe that MBA-M has not found the file BUT that your Avira has not found the file. Avira is one of the scanners at Virus Total that HAS identified it.
The file is identified as part of full speed internet booster, to make sure settings stay after reboot.So your Full Speed internet booster is NOT all gone. So it is exactly as causzomb said, this one is extremely difficult to remove.
I am going to recommend that you do the following:

You must follow these instructions EXACTLY so read them very carefully,
Please download ComboFix by sUBs from HERE

  • You must download it to and run it from your Desktop

  • Now STOP all your monitoring programs (Antivirus/Antispyware, Guards and Shields) as they could easily interfere with ComboFix.
  • Double click combofix.exe & follow the prompts.
  • When finished, it will produce a log. Please save that log to post in your next reply along with a fresh HJT log
  • Re-enable all the programs that were disabled during the running of ComboFix..


Note:
Do not mouse-click combofix's window while it is running. That may cause it to stall.

CF disconnects your machine from the internet. The connection is automatically restored before CF completes its run. If CF runs into difficulty and terminates prematurely, the connection can be manually restored by restarting your machine.

Run Combofix ONCE only!!