illegal system dll relocation.

This message is on screen when the computer is switched on : The system dll user 32.dll was relocated in memory. The application will not run properly.The relocation accurred because the dll c.windows/system32/hhctrl. ocx occupied an address range reserved for windows system dlls the vendor supplying the dll should be contacted for a new dll.
if I click on ok I can only connect to the internet for about ten minutes before it stops loading pages ,if I click on x it seems to run fine but the message returns the next time I switch the computer on.I have no idea what this means or how it happened thanks in advance for any advice.

 

MS has a page on this error,

http://support.microsoft.com/kb/935448/

it may help.