Both Ctrl and Alt stopped working on T410

Hi All,
Today, both Ctrl And Alt keys on my T410 stopped working. I tried updating the drivers, rebooted a few times but no luck. I am using Windows 7 64 bit. There has been no recent changes on my latpop. I can use Fn key as Ctrl key after enabling the swap feature in the bios. I dont know if I can some how use another key for Alt key. I am wondering if it is a key board problem then how come both keys (left and right to the space bar) are not working ? will greatly appreciate any ideas,
Thanks,
-NA

both shift and ctrl doesn't work, so it seems not be hardware issue.
Assumption is the mother of all f.... Okay, did you make sure? Try burning a LiveCD of popular distro, boot from it and see if the issue persists.
Before changing any settings, can you hook up an external keyboard (e.g. a USB keyboard). See if it has the same problems.
After that, fiddle around with keyboard settings an layouts. Perhaps the reconfiguration will help.

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