QUOTE(Cloudx @ Oct 31 2014, 05:34 PM)
Guys.. sorry to disturb, I can't find any thread related to S410p here. Can I know if any of u guys have issues with Lenovo's keyboard software? My ideapad have a weird problem with this, when i press the brightness key for my lcd.. i don't get any animation or notification on my screen that i am reducing/increasing my brightness & everytime i disable the touchpad using the shortcut key... my touchpad gets enabled back after my laptop went to sleep.
QUOTE(mrl @ Oct 31 2014, 10:48 PM)
If your laptop doesn't come with Win8 and you do upgrade installation to Win8, I'd recommend you to re-format and do
clean install the Win8/Win8.1. Upgrade installation does tend to have problem, and I haven't experience issue-free with upgrade installation since WinXP to be honest. Mind you that you might lose some Lenovo stuff like OKR.
If you have done that and problem persist, I'd recommend you to update all drivers from Lenovo website to the latest version. Like what gregyong said, Win8 does eff up big time but I blame both Microsoft and OEMs as well for not providing proper drivers leading to underwhelmed experience; still, personally I dont think this is as bad as Vista. I've had worse problem, bigger performance hit on Vista... but I can agree in some department, Win8 does worse than Vista (WiFi drivers if you need an example)
if none of that works, well... time to go back to Win7 I guess...
QUOTE(Cloudx @ Oct 31 2014, 11:03 PM)
Mine is on Win 7

I had this problem too on my y500 running win 8.1 x64 the time I update geforce drive 344.11. Adjusting brightness just did not brighten nor darken the screen it was at 100% all the time. Could not switch off wifi using hardware keys etc.
I solved this problem by uninstalling geforce driver then fully remove it using Driver Sweeper (Guru3D) in safe mode. Had to be extreme cause normal uninstall reboot then reinstall did not have any effect. But after that everything was back to normal and all function keys working as intended.
I think its an installation glitch which doesn't effect most users cause my other computer didn't encounter this issue. Googling other forums also nothing about this issue. So yeah give it a try it might just be the solution, failing which then you can always fall back to Lenovo SC.