Yes, follow those instructions. I was going to post that link, but got called away.
The best I can tell, from your logs, your computer is clean. However, it is possible there is an infected file. I reviewed your logs and it seems this same problem happened before, when you tried to install some video drivers.
I'm going to suggest an online scan.
Using Internet Explorer browser only, go to ESET Online Scanner website:http://www.eset.com/onlinescan/
Approve the install of the required ActiveX Control, then follow on-screen instructions;
(OPTIONAL, We can remove anything found later if you wish)
Enable (check) the Remove found threats option, and run the scan.
After the scan completes, the Details tab in the Results window will display what was found and removed. At this time, the scanner does not produce a detailed report. That is a planned, future feature. If needed, you should be able to find a file named log.txt in your folder C:\Program Files\EsetOnlineScanner
Look at contents of this file using Notepad or Wordpad. Please post the results.
ps pauuse avast standard shield during the scan, resume it afterwards.