adware got past avast!

AN ADWARE GOT PAST THE WEB SHEILD>… WHAT IS WRONG!!!
the adware was adware,trymedia… luckily mbam caught it… but I thought avast’s detection was decent… this virus has been around for a long long long time…

Can you post the edited link for it (hxxp…)?
Did you got any infected file? Can you send it for analysis?

… mbam already deleted it… sorry… I think it came from a site likr railroad tycoon

heres the log

Malwarebytes Anti-Malware 1.60.1.1000
www.malwarebytes.org

Database version: v2012.02.28.06

Windows 7 x64 NTFS

2/28/2012 7:50:07 PM
mbam-log-2012-02-28 (19-50-07).txt

Scan type: Quick scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 157613
Time elapsed: 4 minute(s), 14 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 1
HKCU\SOFTWARE\Trymedia Systems (Adware.TryMedia) → Quarantined and deleted successfully.

Registry Values Detected: 0
(No malicious items detected)

Registry Data Items Detected: 0
(No malicious items detected)

Folders Detected: 0
(No malicious items detected)

Files Detected: 0
(No malicious items detected)

(end)

Hmmm… A registry key… Are you sure it’s not a false positive from MBAM?

I dunno…

Hello Trymedia system inc. distributes supplies such as digital games for PC or DRM cd / dvd, you have a PC game on your PC?

http://home.mcafee.com/virusinfo/virusprofile.aspx?key=827899

This is NOT a virus and you may have agreed to its download.