Bios lenovo z370 - Lenovo 3000 C200 Notebook

Turn the Lenovo computer off. Leave the computer off for at least five seconds.

2 Press and hold down the "F1" key. Turn the computer on.

3 Release the "F1" key when the BIOS screen appears.

4 Type the current BIOS password into the password field.

5 Click the "Password" button. Select the "Supervisor" icon.

6 Type the current BIOS password into its field. Press the spacebar.

7 Press "Enter" on the blank password box. Press "Enter" on the verification screen. The BIOS password is removed.

8 Click the "Save and Exit" icon.

Read more : http://www.ehow.com/how_8577037_remove-bios-password-lenovo.html

Here is a link to the latest BIOS update for your computer available on the official Lenovo site:
BIOS Update for Microsoft Windows 7 32 bit 64 bit IdeaCentre B500 B505

hi,
go to lenovo site input your model check for latest bios if different to yours use lenovo bios update.this will tell you if the bios does need to be updated and will guide you through the update process.

You may need the Lenovo one key recovery download, the one for windows 7 may work with windows 8 ? There is not a one key downloadable driver for windows 8 on your system the one offered for windows 7 is available in 32 or 64 bit. The power profile for your device sleep wake ect can be adjusted through windows power management it may also need to be adjusted through the nvidia soft ware if it has nvidia graphics. All your troubles would be present if you re installed an OS or upgraded if so there may be several missing drivers ect.

First you need to make sure that all previous drivers are un-installed then you can download the latest driver from your manufacturer`s website and install it. Hopefully this shall solve your problem.

dude .,, its due to overheating caused by busted heat sink... maybe you should replace it to fix this thing...

http://search.freefind.com/find.html?id=62721025&pageid=r&mode=ALL&n=0&input&template=default&query=sgh-z370+housing

There is NO real reason why you cannot reflash your bios back to the way it was.... You simply need to find out what type your, bios is... and there are many programs that will address your BIOS and re-flash it. This is unless your BIOS is so broken that the machine will NOT even read a DVD memory stick or driver at all. What happens if you try again?
Some links below... all about it.

forums.lenovo.com/t5/Lenovo-3000-and-Value-line/.../198717 forum.lenovo.com/t5/T61-and-prior-T-series...bad-bios/.../true;...

how to remove bios password in my lenovo laptop