I moved this to a more appropriate section - Malware Discussions, also got rid of that link in case someone clicks it.
Follow the instructions in this document, particularly the Safe Mode ones: https://community.mcafee.com/docs/DOC-1294
If that doesn't help follow the Hijackthis instructions nearer the bottom of this post: https://community.mcafee.com/thread/1996
You should be able to access URL's correctly by booting into "Safe Mode with Networking" which gives you the Internet whilst barring most programmes including malware from running.
To do that tap F8 repeatedly while booting up and then click the 2nd item in the ensuing menu.