"Virus Scan Failed" every time I attempt any download

Hi Casey,
Thank you for posting your query in Microsoft Community.

From your issue description I understand that whenever you try to download any pictures, PDF's, documents you get an error message Virus Scan Failed

In order to help you better please provide us the following information:

1) How did you uninstall the anti-virus program?
2) What Is the complete error message you get?

To fix the issue with the error message you can follow these steps:

Method 1: Uninstall complete MacAfee traces.
Whenever you install nay anti-virus program some of the traces of the anti-virus programs will be saved in the registry of the operating system, and it will not be deleted when you uninstall the program.

I would request you to download the MacAfee removal tool and remove the traces
Refer to this link:
http://mcafee-removal-tool.com/

Method 2:
Step a: safe Mode
It Starts Windows with a minimal set of drivers and services, If a problem doesn't reappear when you start in safe mode, you can eliminate the default settings and basic device drivers and services as possible causes.

Refer to this link:
http://windows.microsoft.com/en-US/windows7/Start-your-computer-in-safe-mode

If the issue does not persist in safe mode then follow step b

Step b: Clean Boot.

Perform clean boot to identify if any 3rd party service is causing this issue:

Note: After you have finished troubleshooting, follow these steps to boot to normal startup.
a) Press the ‘Windows + R’ key on the keyboard.
b) In the ‘Run’ windows type ’MSCONFIG’ and click ‘Ok’.
c) On the ‘General’ tab, click the ‘Normal Startup’ option, and then click ‘OK’.
d) When you are prompted to restart the computer, click ‘Restart’.

For any Windows related assistance in the future, feel free to contact us and we will be glad to help.