Suspicious entries in NIS history

Hello. This morning I noticed several entries in NIS that were odd. First off, I noticed a download from somewhere called ak.imgfarm.com that downloaded a file called weatherblink[1].exe which seems to install a weather blink toolbar. This activity wasn't on mine, so I don't know if it was unauthorized or not. Then I checked back again and it had these entries

 

You allowed Run a MindSpark DLL as an App to access your network resources.

 

You allowed COMPANY_NAME skin Player to access you player resources.

 

You allowed Run a MindSpark DLL as an App to access your network resources.

 

What is WeatherBlink[1].exe or ak.imgfarm.com? Are they safe and if not, what can I do? Thanks!