malware popup on 1 website plus slowness sometimes

My issue is I get an error and popup from Avast saying that the page on qualtrics is harmful. I do paid survey's using qualtrics. The other issue is sometimes my computer bogs down and gets very slow, but I think that is from taking screenshots and pasting them into paint. I go into task manager and end processes on anything to do with Catalyst Control Center. I also have many scripts installed on firefox / chrome (actually deleted from chrome today) that has to do with the work I do online.

I scanned (full system) with Avast and malwarebytes last night. There were some 'locked' files that malwarebytes couldn't scan. They were under a hidden file on Drive C that had to do with installing flashplayer.

I personally think it's just an issue with the qualrics website because it doesn't happen all the time but you never know...

It happened just now so:
Avast warning: http://imgur.com/BYtRMeU,0ljaQ6Q#0

Waited a minute and could use it after that...

My Log:
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: AMD Sempron(tm) 140 Processor, AMD64 Family 16 Model 6 Stepping 2
Processor Count: 1
RAM: 1790 Mb
Graphics Card: ATI Radeon HD 4200, 256 Mb
Hard Drives: C: Total - 293485 MB, Free - 219902 MB;
Motherboard: Dell Inc., 04GJJT
Antivirus: avast! Antivirus, Updated and Enabled