Most of the times, when you reset Internet Explorer settings or start Internet Explorer without any add-ons, it should resolve the problem related to download. Since the problem remain after using the above steps, there is a possiblity that your antivuirus/security software is causing the problem.
The following options can be tried next:1
Try to restore the system to a previous restore point
Click the Windows icon (Start) button-> All Programs-> Accessories-> System Tools-> System Restore. Click on Choose a different restore point, and click Next.
You will see a list of restore points.
If you find the date when the computer worked properly then click on it and click Next. Otherwise click on the check box Show restore point older than 5 days, and then select your preferred date.
The system restore will take a while to complete, when it does, your computer will restart automatically.2
If system restore does not help Or no restore points are listed, uninstall AVG from Control Panel-> Programs-> Uninstall a program.
You can also use AVG Removal Tool to completely remove every trace of AVG from the system.
As you are unable to download anything from the affected computer, you may need to download the removal tool from a working computer.
Use the following link to download AVG Removal Toolhttp://www.avg.com/us-en/download-tools
(download AVG Remover 32 Bit)
Once downloaded, move it to the affected computer and run the tool
When completed, restart computer. When it starts again, reset Internet Explorer once more:
In Internet Explorer, click Tools->Internet Options
Under Reset Internet Explorer settings, click Reset
. Then click Reset
Restart Internet Explorer
Done that, try to download any file and let me know results