Hello rpaul,
Have you used a USB still at any time on this machine? If yes, you most likely got the autorun.inf worm from an infected USB stick.
1. Please download and install the
Panda USB Vaccine for USB deviceshttp://research.pandasecurity.com/panda-usb-and-autorun-vaccine/ and it can be run on any drive on your machine for removable devices.
You are given the option to "vaccinate" your machine [click "yes/OK"], which means to disable autoruns from infecting your machine again or in your case from the infection spreading. Plus you can "vaccinate" any USB/flash or removable device so that it cannot infect your machine.
2.
Do not insert any removable media devices into your machine, such as anything that would go into the A:/drive, CD/DVD, USB sticks, sync anything with your machine, etc.
3. Check the information on the
first post of this thread under Virus/Worms for you to check your machine for malware:
http://forum.avast.com/index.php?topic=53253.0.
Follow the directions of obtaining an
MBAM log (make sure you
update MBAM first) and the
OTS log (save them as ANSI and not Unicode). Post the MBAM log and the OTS log as an
attachment (Additional Options > Attach > Post).
I am going to refer you to our Certified Malware expert, named Essexboy. He will also review your logs and give you further instructions, however he comes on the forum late UK time. He will respond to you in this thread, so remember to check this thread daily.
Please do not make any further changes to your machine after you have provided the logs.Once your machine is free of the infection, we will need to disinfect your USB sticks. What forms of removable media devices do you use?
Let me know if you have any questions. Thank you.