Having Trouble Accessing Web Sites

For the past 2 days, I have been trouble getting to two specific Web sites.  www.informationbuilders.com and www.iwaysoftware.com.  Both of these are related (two divisions of the same company).  The only way I can reach them is when I connect to my company's VPN.  My husband is able to access both sites from work, and so is my sister.  So it is something on my end.  But EVERY other site works just fine, it is only these two. 

 

I have tried two different browsers (IE and Chrome), and ran a full system scan, which came back clean.  

 

A friend of mine swears this is some sort of malware on my computer.  If so, then why only one site, and why THAT one?

 

Anyone have any ideas?