Help! Repeat warning when log in. 4dlmng.com/snz/sfen403int21.exe

[VitariKay]

Hello,
Please help if possible.
Everytime I log into my computer I get a message from Avast saying http://HTTP://4dlmng.com/snz/sfen403int21.exe
I have no idea what this is. When I click 'more details' (only thing I can click on apart from report this as false positive) it only says what it said in box before but an additional box saying Upgrade.
I have completed a full scan from avast and nothing shows, also a malwarebytes scan with no issues reported.

Please please help as It is starting to worry me.

Kind Regards
Kay

[Pondus]

have you downloaded any new programs lately?

it seems you have something that want to download the offermosquite adware/browser crap
https://www.virustotal.com/nb/file/c6d5d6d3c8535bc6ad9d4781e2449df801e667dbd5705264c1cafc22c9d7acb7/analysis/1388793873/

[Pondus]

follow this guide and attach (not copy and paste) the requested logs  http://forum.avast.com/index.php?topic=53253.0

we need Malwarebytes / OTL / aswMBR  logs