Hijackthis log

I installed Avast, malwarebytes, and Spybot. They all came up with some virues that were removed. I rebooted and came back to after it sat for a little bit and Avast! was uninstalled and all the files in the Program Files were gone... I'm assuming that I got a nasty virus and need your help. Attached it my hijackthis log. Thanks in advance!

Hello H0B0_Byter99,

Please see the sticky which includes guidelines for this forum and also instructions in post #2 on how to provide preliminary "DDS" logs which are used for analysis.
"BEFORE You POST"(Please read this Procedure Before Requesting Assistance)

Then start a new topic providing the logs and a volunteer analyst will advise you when available.

If DDS won't run please start a new topic anyway informing of the issue and provide a link back to this thread.

Best regards.