Right now my PC does not recognize either USB port, and that means my memory card reader and printer cannot be used. I went into start>settings>control panel>system and saw no error messages. A few days ago I ran a disk cleanup program, and it MAY have caused this; I am not certain when they were last working. I made no changes in the devices and their conections were and are secure. Any idea as to a solution?? Thanks to those who can help.