Regarding the recent malware reports coming from the ads.

[DreadWingKnight]

First, thanks everyone for reporting this.  We have security checks in place but after that, the experts via the forums are our first line. As reported here, there was a security issue whereby if you hit a certain ad, the ad was able to convey a file called meadgive. Windows Defender or other security products would pick this up and block it, often repeatedly.

We shut off all ads of this type to contain the issue while we traced the source. The source was an ad partner who had been compromised. After getting positive confirmation and notification of their fix, we tested and verified the fix before restoring normal function. 

Users who were affected may have remnant activity - Windows Defender is known to keep popping up the warning even after cleaning the machine as mentioned in the article below. 

http://news.softpedia.com/news/windows-defender-keeps-reporting-exploit-swf-meadgive-infection-on-some-pcs-515668.shtml

Based on our observations, it looks like some temporary internet files cached in the machine are causing the windows defender to keep popping up the same error. If users can delete these temporary files and upgrade to the latest version of the windows defender then this issue should be resolved for them. Detailed instructions are below.

Alternatively, Malwarebytes may be better at clearing the malware traces. 

Thank you. We monitor ads consistently to avoid these situations and regret any issues this may have caused you. 

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Steps to delete cached files from your browser

CAUTION: If you use Internet explorer as your default browser, then make sure the passwords are not selected; otherwise you will lose all the saved passwords. Also, this process also deletes a lot of information from your favorite websites that they use to give you personalized experience. Therefore you might observe that you are logged out on some websites and lost any unsaved carts after you do this.  

1. Quit all the applications currently running. 

2. Open Internet explorer. 

3. Go to Settings --> Internet options --> General Tab. 

4. Click on 'Delete' under browsing history. 

5. In the pop-up make sure that options for 'Temporary internet files', 'cookies' are selected and 'Preserve favorite website data' is unchecked and then press 'Delete'. 

6. Click Apply.