I am also having this problem on two separate computers. It presents like adware/survey/polling sites trying to phone home but about 8 or 9 of them do it one right after the other. I’m glad avast is catching it but man, is it annoying. The required logs are attached. I hope one of the experts can help… Thanks in advance.
Could you let me know if this stops it
CAUTION : This fix is only valid for this specific machine, using it on another may break your computer
Open notepad and copy/paste the text in the quotebox below into it:
CreateRestorePoint: U3 McAPExe; No ImagePath U3 McMPFSvc; No ImagePath U3 McNaiAnn; No ImagePath U3 mfecore; No ImagePath U3 MSK80Service; No ImagePath 2015-06-22 16:25 - 2015-06-09 14:46 - 00000000 ____D C:\ProgramData\boost_interprocess 2015-04-27 14:13 - 2015-04-27 14:13 - 0000088 __RSH () C:\ProgramData\9859C75700.sys RemoveProxy: EmptyTemp: CMD: bitsadmin /reset /allusers
Save this as fixlist.txt, in the same location as FRST.exe
https://dl.dropboxusercontent.com/u/73555776/FRSTfix.JPG
Run FRST and press Fix
On completion a log will be generated please post that
Thank you. Here’s the log. But it is still doing it… 9 harmful websites as soon as the computer rebooted.
Could I have a screenshot of the avast popup please
Here’s one of them. There are several. They seem to be the same except for the URL.
Some of the other URL’s: mansurvey.net; lycosurvey.net; chosurvey.net; pollinois.net and stetsurvey.net. There are more but they disappear so quickly
OK you have a lot of Firefox addons and any one can be subverted… So first could you start firefox in safe mode and let me know if you still get the alerts
https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
So far, so good. I presume i need to completely wipe my Firefox install including profile and start over? Fortunately, I have a full backup from before this started happening.
Yes as they find a lot of little hidey holes so a clean install of FF would be recommended
So far so good. Haven’t had a popup warning in hours.
Thank you for all the help.
Subject to no further problems 
I will remove my tools now and give some recommendations, but, I would like you to run for 24 hours or so and come back if you have any problems
Now the best part of the day ----- Your log now appears clean 
A good workman always cleans up after himself so…The following will implement some cleanup procedures as well as reset System Restore points:
Remove tools
Download and run Delfix
Select the options as shown
https://dl.dropboxusercontent.com/u/73555776/delfix.JPG
: Keep Java Updated :
WARNING: Java is the #1 exploited program at this time. The Department of Homeland Security recommends that computer users disable Java
See this article
I would recommend that you completely uninstall Java unless you need it to run an important software.
In that instance I would recommend that you disable Java in your browsers until you need it for that software and then enable it. (See How to diasble Java in your web browser and How to unplug Java from the browser)
If you do need to keep Java then download JavaRa
Run the programme and select Remove Java Runtime. Uninstall all versions of Java present
Once done then run it again and select Update Java runtime > Download and install Latest version
https://dl.dropboxusercontent.com/u/73555776/javara.JPG
Now that you are clean, to help protect your computer in the future I recommend that you get the following free programmes:
Update and run weekly to keep your system clean
Click on the link above to be taken to Unchecky.com
click the very large Download button.
click Save
Click Open folder
Right click on the Unchecky_setup and choose to Run as Administrator
Once open click the Install button.
Then click on Finish
Unchecky is now installed and will help you keep unwanted check boxes unchecked, this is a fire and forget programme 
It is critical to have both a firewall and anti virus to protect your system and to keep them updated.
To learn more about how to protect yourself while on the internet read this little guide Best security practices Keep safe 