LogMeIn.com and interference on certain websites

"I've used Logmein extensively to support family, and have never seen any problems with it interfering with browsing. You are probably going to want to dig deeper into network, dns, Internet Explorer, or user problems.

Starting points
check the hosts file. (viruses will sometimes edit these to redirect where they want.)
check the dns settings
check the IE default search settings. (hijackthis makes this easier)
And, continue to check for viruses and spyware."