There are cases of malware causing this issue....
You'll have to go here....
http://www.computerhope.com/forum/index.php/topic,46313.0.htmlIf you've lost your connection, download the programs to a USB stick on a good PC and transfer them to your PC.
If you have difficulty, you may have to run them in safe mode, tap F8 at start, .
If you have difficulty, you may have to rename the programs when you save them.
If you get stuck on a step, proceed to the next .
Post the logs for step 3,4 and 6.