Modifier keys not working after 10.6.7 update

After the most recent 10.6.7 update, my modifier keys no longer work. I switched my Command and Option keys over a year ago, but now even when I'm in System Preferences>Keyboard>Modifier Keys and I switch them back and forth from Restore Defaults to the way I had them, nothing changes. I deleted /username/Library/Preferences/ByHost/com.apple.HIToolbox.UUID.plist and logged off and back on, but that didn't work. Any suggestions?

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Some keybaord keys not working after suspect virus on Tecra A

Apostrophe, delete, semicolon and end keys not working after a suspected virus attack. I found record of the same problem on the net but apparently this guy fixed his problem after he found scroll lock or num lock on.
This is not the case here but there is something going on with numlock - register shows 2 and not 0. change to 0 but when reboot back to 2 again.
Suspect changed back by bios. I thought i couldnt get to bios because DEL key not working but found ESC works.
Tried to reset default values for bios but then cannot save and exit as this required the END key to work.
I was running XP at the time of the (suspected) attack and could not rectify the problem so put the computer back to the OEM status which i hoped would help - it did not, same problem so rather than install all the software on the computer again with XP i upgraded to Windows7 - fresh install.
Still keys do not work - it was a real pain to start with as my computer was set up to ctl+alt+del to log in and i had to do this with on screen keyboard - XP - this also showed that numlock was on before and after windows boot.
The reason i suspect a virus - my wife was watching one of her tv shows on line from home country (another toshiba laptop) and i needed to use that laptop for something else so i asked her to use mine - later on we turned the laptops off and in the morning turned tham back on again, the other laptop with AVG virus protection flagged several hits and this one with (FAMOUS and completely up to date) Norton flagged nothing - once i got into it using on screen keyboard.
Problems with this computer was found after scanning with a different antivirus.
Anyway - i am left with 4 keys that do not work on my keyboard (actually they did work after i logged into the computer for the first time but i had to hold them in for a long time - and then next time i rebooted, not work at all and havent ever since)
Any assistance here would be greatly appreciated, i have been working on this all weekend with no joy at all.
Thanks in advance.

Thanks Xardas,
I have essentially done both - tried Toshiba OEM status found on a small partition of the toshi hard drive - no good - then did a fresh install of Windows 7 - still no good
You know - as cunning as it sounds - i cannot reload the default settings in BIOS as it requires the END key to work so i can Save & Exit - all i can do is Exit Without Save - i sort of feel snookered at the moment.
Toshiba got back to me today and said that i have tried everything they would have (yeah for sure) and to take my machine into a service centre for a hardware check - yeah right on boys!
Check out this guys post below found on Kioskea.net - getting close to a year ago...
ms ml - Nov 10, 2009 12:52am GMT
Hi there, I was hoping that you might be able to help me with the problem that I seem to be having with my Toshiba Satellite Laptop Keyboard too. For a few days now I havent been able to use a few of the keys on my keyboard, including (1) delete (the backspace key is still working though), (2) colon/semicolon, (3) apostrophe/quotation marks and (4) end (the home and PgUp and PgDn keys are still working though). Any suggestions?
Identical to my problem....obviously this guy had the same problem as well...see below - same thread.
yab - Feb 9, 2010 4:47am GMT
hi did you ever figure this out? i have the same exact problem...
However, i was not able to solve my problem the way this guy did - my scroll lock is not activated - it seems to work ok (on and off) i tested it using Excel to move around the cells.
yab ms ml - Feb 9, 2010 7:57am GMT
Nevermind. For me it was scroll lock. My apostrophe, semicolon, and delete keys are alive and working again. I hope you have the same easy fix.
Incidently - never hear from the first guy again - probably ended up being his scroll lock.
all sugestions welcome - sorry my smily face has no eyes -) guess why!

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Message was edited by: v1ncen7

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Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

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Section "InputDevice"
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0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
I'm not entirely sure if this is relevant tough.
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EDIT: I should perhaps add this:
I'm not using a composite manager like Compiz or Beryl, and I do not have composite nor AIGLX enabled in my xorg.conf.
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Last edited by sunn (2007-11-07 16:28:46)

It seems the problem has resolved itself. I did a pacman -Syu today, and although only libsamplerate was upgraded, my AltGr key functions properly again. Kind of weird, as libsamplerate seems to have something to do with audio.. But hey, it works, and I'm not complaining.

Modifier keys not working after 10.6.7 update

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