Logitech Cordless Mouse "wireless key board wont" Questions

...the keys by selecting the Key to be changed. Hope this will help some. Bud i think my switch for turning on my wireless connection is broke fn f4 normally turns it on but it wont work hp pavilion ...

...wireless keyboard and mouse it is and Mi restalled it three times and still wont work it came on for a minute then nothing Did you use the CD Software program that came with the Keyboard and Mouse ...