I do understand that this is a FP and I did update to the current database. I did choice to delete the file but as it is a secure system file created by microsoft deleting the file does nothing. The file comes back each time because you cant really remove a system file unless you boot into safe mode and manually remove that file.
This issue I got today and to be most honest I do trust avast which I can now see that this type of situation can lead to a real bad problem. I hope that in future updates avast is more careful and test their updates more carefully so that in future updates it will not spot a virus problem on a major needed file and cause the computer to not boot or worse.
For those that do believe the file is infected i suggest using http://virusscan.jotti.org/en to make 100% sure that the file is infected and If so then boot into safe mode go into windows\system32\driver and delete it. I dont suggest doing this only because avast said it was virus file because as we now can see this has been the first FP in avast but then again whos to say it will be the last :wink: