HP Photosmart B110 all in one printer. It is a wireless unit. We have a PC and two lap tops. Until recently the system worked rather well. Then for what ever reason printing became difficult.I cleaned all HP off the PC and re-installed MANY times. First with the CD then off HPs website. Finally got it to work. About a week ago, one of the laptops was unable to print.Have re-installed from HP website. Keeps coming up with Fatal error during installation. Tried a test from laptop the printer thinks about it. The little screen tells me it is printing but nil happens. Have used HP diagnostic tools and it says the system is perfect. I can print fine from my PC and other laptop. Am not getting just a little exasperated!!!