URL:Mal avast pop-up keeps appearing

Every few seconds an avast pop-up keeps appearing, i’m not sure what i did or why it keeps doing it! But please help? It’s really annoying…
It says infection: URL:Mal
I’ve run my avast and malware check but it says there’s no problem. Yet it keeps popping up.
Can anyone help?

I’ve attached AdwCleaner, OTL log and aswMBR log.
I ran Malwarebytes’ Anti-Malware and it was completely fine, no problems found.

“URL:Mal” means you are visiting a website that almost certainly is malicious. That is why avast shows the popup. Stop visiting (potential) malicious sites.
Ofcourse the scans didn’t found anything because the problem is not on your system but with the website(s) you are opening.

Every few seconds an avast pop-up keeps appearing, i'm not sure what i did or why it keeps doing it! But please help? It's really annoying...
if this happens when you are not doing anything....you may have a infection can you also attach malwarebytes log?

malware removers are notified. it may take hours before one arrive so be patient

Let me know if this stops 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
[2012/03/06 14:31:26 | 000,000,000 | ---D | M] ("Premiumplay Codec-C") -- C:\Users\Ashley\AppData\Roaming\Mozilla\Firefox\Profiles\syr2t58a.default\extensions\crossriderapp435@crossrider.com

:Files
C:\USERS\ASHLEY\APPDATA\ROAMING\MOZILLA\FIREFOX\PROFILES\SYR2T58A.DEFAULT\EXTENSIONS\FFXTLBR@FUNMOODS.COM
C:\Users\Ashley\AppData\Local\Google\Chrome\User Data\Default\Extensions\jpnbdefcbnoefmmcpelplabbkfmfhlho
ipconfig /flushdns /c
netsh int ip reset c:\resetlog.txt  /c
ipconfig /release /c
ipconfig /renew /c

: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.