Keyboard and mouse issues following Snow Leopard update

I have a relatively ancient iMac--first aluminum bodied Intel-based model c. 2007. I was having issues updating my browsers (firefox, chrome) because I was on the old OS X (10.5.8 I think). So I did the Snow Leopard upgrade and since then have been having persistent keyboard (aluminum wireless) and mouse (mighty mouse connected via USB) issues.
I have verified the keyboard is connected via Bluetooth. I have verified that the keyboard is responding by opening the keyboard viewer and watching each of the keys light up as I type. Also, the keyboard will wake the computer from sleep and sometimes allow me to toggle between programs with Command+Tab.
Nevertheless, the keyboard will NOT type inside programs such as Word and Chrome. (It WILL type in the Post-it Note dashboard app, but I can't copy and paste into a browser from there.)
The Mouse will work in Chrome but in Finder and iTunes, e.g., it will not work. I can't use the mouse to select a folder in the folder tree to the left or to select a song or file/folder in the main window. I CAN, however, use the mouse to minimize/maximize/close each window.
Rebooting corrects the problem temporarily, but if I get up and walk away for a bit the keyboard and mouse re-freeze upon returning.
I have reset the PRAM and SMC because I saw these fixes listed in other discussion threads. Neither has fixed my issue.
Any help would be greatly appreciated.
Cheers,
Steve

Hi Steve,
One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
Reboot, test again.
If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on, Check System Preferences>Accounts>Login Items window to see if it or something relevant is listed.
Check the System Preferences>Other Row, for 3rd party Pref Panes.
Also look in these if they exist, some are invisible...
/private/var/run/StartupItems
/Library/StartupItems
/System/Library/StartupItems
/System/Library/LaunchDaemons
/Library/LaunchDaemons

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Hi Arch Guros!
Please be easy on me, this is my first post and I'll try to make it as specific as I can..
When I use the Arch Linux Boot CD to attempt to install Arch Linux I noticed that my keyboard was not working..
I walked away from my computer for 5 minutes and when I came back I noticed that the keyboard it was lit up and working.. I noticed after a few reboots that the keyboard does in fact takes a few minutes to start to work and I noticed that this started to happen on my second hard drive running Linux Mint (when I fell back to it).. However, with a Windows 7 installation, this does not happen.
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Bus 009 Device 006: ID 06a3:0728 Saitek PLC
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dmesg Output:
http://pastebin.com/0ci5kvy7
USB relevant dmesg Output:
http://pastebin.com/JAWmH1dP
I've noticed A LOT of usb descriptor errors and usb address issues..
I have tried flashing a new BIOS to my motherboard (gigabyte 990fxa-ud5) and resetting the settings on it to factory defaults.. This dmesg output is when JUST my keyboard is connected..
I will attach the two files with the errors..
If you need anymore information please ask, I can provide anything you need..
Thanks in advance guys! I hope I have met the forum etiquette.. (I was intimidated by the date output question >.>)
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This question was solved.
View Solution.

Hi,
There were some issues with the last batch of critical/recommended Windows Updates this month.
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****I am not an HP employee****
Please give a" Kudos, Thumbs Up" if advice received is relevant or" Accept as Solution" to assist other forum users having a similar problem.
HP Products:
810-150se Desktop (Win 8.1)
17t-j000 Notebook (Win 8 upgraded to Win 8.1)
H8 1380t CTO Desktop (Win 7)
560z Desktop (Win 7)
Other PC's:
Dell Inspiron Notebook (Win XP upgraded to Win 7)
Custom build: (Win XP upgraded to Win 7)
Errare humanum est.

If you are having WIRELESS issues with SNOW LEOPARD.. update your software

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I never had an issues with wireless before. Still don't. What was the problem?

Keyboard and mouse issues following Snow Leopard update

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