Some times this error message is caused by connection problems. The internet connection is some times stuck due to the over traffic and server down problems. The website you are looking for may contain many items to load. This may be another reason for this error message.
There can be many reasons why we get the above error.
1)Internet explorer installation might be improper.
2)There is not enough ram virtual memory to process the HTML request.
3)Improper our partial installation of some 3rd party plug-ins can cause this problem
4)Virus or malicious software can slowdown the virtual memory by over loading.