Drviperx

Okay the vbios for the SLI version does not work with the windows 8.1 update. Any fix?

Anyways I think SLI'ing between two different GPUs is not good. We'll if they use the same architecture it is possible I believe. But the chances of it failing is extremely high. So I suggest buying the same ultrabay gpu as the default machine gpu. And trust me it does give a quite a good boost.

Well it can either be a problem with the battery or a software related issue. Just like @forevertrj said batteries can release the battery liquid as gas. And usually it is said that lithium ion battery at least loses 20% of its capacity during a single year of usage. And sometimes the batteries can become quite unstable as the time passes. Extremely fast battery draining. Wrong battery life calculations can happen. If it's a simple software problem I suggest finding alternative drivers or softwares

You have to install the vbios update. You can find it here NVIDIA GeForce GT750M Second VGA BIOS Update for Windows 8.1 (64-bit) - IdeaPad Y410p, Y510p

Says an error 284 Fail to load driver. Administrator privileges required. But I ran it as administrator. Any idea why.?