Windows 7: Win 7 64 Bit Laptop keyboard unresponsive

Win 7 was freshly installed on my laptop on a brand new 160 gb hard drive. 1st fresh install was Win Home ver 7 32bit. After installing 32 bit , realizied I mistakenly installed Win 7 32 bit Home version. Product key revealed original software was Win 7 Pro 64bit. Keyboard problem did not occur with 32 bit version. Once I installed the Pro 64 bit version the keyboard was non responsive.

Keyboard worked fine with 32 bit install and unresponsive after 64 bit install. Touch pad works.

I carefully removed and installed brand new laptop keyboard. Same identical problem. Non responsive laptop keyboard. Suspect this is a software problem but unable to know which/what software driver may be compatible with 64bit Win 7Pro version.

Sounds like a driver issue. This may help you: Dell Inspiron 1520 – Windows 7 64 bit drivers « Mileski’s Weblog

To Anthony's email suggestion I BENEFITTED GREATLY BY THE LINK'S LISTED DRIVER UPDATES; HOWEVER NONE ADDRESSED THE ORIGINAL KEYBOARD PROBLEM INITIALLY DESCRIBED IN THE ORIGINAL THREAD. DEBRA 1533

To date this, and other recommendations have done nothing to resolve the most urgent problem: Keyboard on dell 1520 Laptop is disabled due to ?

Only fact seems to be at the back of my mind; after trying everything else is -
Originally this laptop was loaded with Vista. Then once Windows 7 came out, it was installed (presumably) over Vista. Once I received it early this year all was working perfectly.

1. Hard drive dies
2. I install new hard drive and I installed win 7 32bit and later discovered no match for my product key (keyboard didn't work then either.)

3. Windows 7 Support assists me in determing my product code is associated with Win pro. I acquire Dell's original Win 7 64bit install disc. Io install wein 7 64 bit software. Upon start up discover touch pad works but - keyboard is non-reaponsive.

4. I then uninstalled and reinstalled Dell's only driver for 1520's keyboard + nothing happens.

5. I research answers from Dell - no drivers or any resolutions re win 7 64bit exists.

Suggestion there should be a chipset drive making keyboard & win 7 64bit compatible - have yet to find it & trying to balance a small keyboard on laptop that slides arounds is not a viable solution. Other functions like sound buttions in are below touchpad is non+responsive as well. I would be most appreciative for an useful fixes. Awaiting help. Debra1533