Malicious URL Blocked warning popping up everywhere

I have the free antivirus program, which has been working great; but today it appears that on every site or page that I go to, including the avast homepage, and this forum, my browser homepage, my email accounts, etc, literally nearly everywhere, I am getting the Malicious URL Blocked popping up. I have done a complete system scan with no threat found, scanned my browsers application exe Google Chrome and Firefox, no threat found, scanned all removables and shortcuts, no threat found. What do I need here?

First could you post a screenshot of the alerts … It will let me see what is causing it

Download OTL to your Desktop

[*]Double click on the icon to run it. Make sure all other windows are closed and to let it run uninterrupted.

https://dl.dropbox.com/u/73555776/OTL_Main_Tutorial.gif

[*]Select All Users
[*]Under the Custom Scan box paste this in
netsvcs
BASESERVICES
%SYSTEMDRIVE%*.exe
/md5start
services.*
explorer.exe
winlogon.exe
Userinit.exe
svchost.exe
qmgr.dll
/md5stop
%systemdrive%$Recycle.Bin|@;true;true;true
CREATERESTOREPOINT

[*]Click the Quick Scan button. Do not change any settings unless otherwise told to do so. The scan wont take long.
[*]When the scan completes, it will open two notepad windows. OTL.Txt and Extras.Txt. These are saved in the same location as OTL.
[*]Post both logs

The object listed in the warnings is http://i.trkjmp.com/crossdomain.xml

posting logs below

can not post the logs… they are far too large

Either break them in two messages or attach them here through ‘‘Attachements and other options’’ on the new post screen.

Use the attachements details here about one third the way down http://forum.avast.com/index.php?topic=53253.0

OTL text here

Extras text

Let me know if this kills it

Warning This fix is only relevant for this system and no other, using on another computer may cause problems

Be advised that when the fix commences it will shut down all running processes and you may lose the desktop and icons, they will return on reboot

Run OTL

[*]Under the Custom Scans/Fixes box at the bottom, paste in the following

https://dl.dropbox.com/u/73555776/OTL_Fix.GIF

:OTL
[2012/03/31 23:38:41 | 000,000,000 | ---D | M] (Codec-C) -- C:\Users\DavidM\AppData\Roaming\Mozilla\Firefox\Profiles\pki5xnrr.default\extensions\info@allpremiumplay.info
FF - prefs.js..extensions.enabledAddons: info@allpremiumplay.info:1.0
O3 - HKU\S-1-5-21-2033364642-1299926-1655036352-1000\..\Toolbar\WebBrowser: (no name) - {D4027C7F-154A-4066-A1AD-4243D8127440} - No CLSID value found.

:Files
C:\Users\DavidM\AppData\Local\Google\Chrome\User Data\Default\Extensions\joifgdlkhokekeaenpkaehbnjhncglbh

:Commands
[purity]
[resethosts]
[emptytemp]
[CREATERESTOREPOINT]
[Reboot]

[*]Then click the Run Fix button at the top
[*]Let the program run unhindered, reboot the PC when it is done
[*]Open OTL again and click the Quick Scan button. Post the log it produces in your next reply.

It seems to have worked…it did freeze at the end, and I had to reboot it myself; but thus far, coming back here, no problems… thank you

All is good now ?