Lost All Keyboard And Mouse Functions?

I usually dont beg, however, I have lost all keyboard and mouse funcitons in my computer and this happened directly after I installed my new Keyboard by Kensington PilotBoard. I have other 2.4Ghz wireless by Logitech as well as ps/2 and usb wired keyboards and mice by microsoft and logitech. It all was ok, the kensington mouse was not smooth so getting the buttons or whatever was recommended and went to the website for the 'most up to data' software. that was the end. after a reboot i have been lost. The computer boots up and actually functions in its serverlike capacity with its internet cable and for the center of the little home network. i just can not make the cursor arrow move. no keyboard input, I tried safe mode, nothing. I tried Safe Mode with Command Prompt, cant write a command even if i knew what to put in there. NO Safe Mode operation of usb, wired mouse or keyboard. I went to cmos and made all changes to basics , no good. but the only time the keyboard will work is directly in the bios . But not any Bios change I made had any impact on the lost functions.Since I built it myself, I have a back up or restore disc but can not access that. i can not roll anything back , cant get to device manager. or at least I havent been able to make it do anything but a boot. i do the reset to give me the options of another start in safe mode but it still has no key or mouse functions .