Unfortunately, you haven't old us much to help you with.. Which operating system are you using and which version of Internet Explorer are you using? What have you tried already to fix the problem? Does IE connect to the internet correctly? Is the problem simply a "color" issue? If so, did you check the "Display" settings in Control Panel?
Have you scanned for malware with removal tools such as Malwarebytes or SuperAntispyware yet? It's a good step to start with..
Hope this helps and let us know more.
How do I fix a black Windows Internet Explorer toolbar?