Acer laptop aspire 5100

Oh boy. You can't be serious with this post? Do you really think that anyone is going to be able to intelligently respond with your lack of information and troubleshooting??????????????????????????????????
 
Resource conflicts can sometimes be fixed in Device Manager -- sometimes in the BIOS by disabling ports that are not being used, to free up resources.

But as Boonality says, you need to give a little more detail.