I have 2 computers in my home. On one, when I do a Google search it gives me what I've asked for. On the other, it brings up web sites that have no relevance to what I asked for.

It sounds like a common virus. Use the following tools to correct it:

Thank you for downloading Malwarebytes Anti-Malware from Download.com

And

http://download.bleepingcomputer.com/sUBs/ComboFix.exe

Afterwards, make sure you antivirus is up to date and running correctly.