Can I boot from USB on a lenovo G50-30 laptop?

Please, I'd like to know if the boot menu on a Lenovo G50-30 laptop includes an option to boot from any USB unit (flash drive, external DVD reader, external HD, you name it).

Also, how do you access the boot menu on this specific laptop?

See, I'm interested in buying a G50-30 Lenovo lap, but the problem is that this particular machine doesn't include a DVD-ROM unit (optical drive). So If I have any problems and need to reinstall Windows, I'll need to do it from an USB unit.

My laptop battery keeps draining while plugged in?

I bought a new Lenovo G510 laptop two weeks ago. I've been keeping it blugged to the charger all the time. Today I noticed my batery to be stuck at 93% as time passed it dropped to 91%. When I start the laptop up it starts charging for about 10 seconds and then it stops even though it says it's charging. What can I do?

Is Lenovo AC Adapter supports any Lenovo laptop?

I have a friend who has the laptop that look the same as my laptop, only it is bigger, I have lost my AC adapter, Is it ok if I use his AC adapter with my laptop? His AC adapter is bigger than mine

I need a gaming laptop for $600-$700 that can run Day Z, Minecraft, and GMOD?

I would like to play on these settings.

Preferred Minecraft settings: Fast, 12 chunks, V Sync off, would like stable 50-60 FPS (I have Optifine installed)

Preferred GMOD settings: Medium to High, would like a stable 50-60 FPS

Preferred Day Z settings: Medium to High, would like a stable 40-50 FPS

What kind of laptop should I get? Looking for Windows, cheap, light?

I need to buy a new laptop and I have no idea where to start. I want a Windows (8.1 probably) that is light enough to carry around university campus all day and has a long battery life to match. Otherwise, the specs don't really matter. I game a bit on Steam and use Chrome, social media, and tonnes of docs/pics/pdfs/music files but not actual hardcore software. I'm also kind of very much broke so the cheaper, the better.

My 15.6 laptop display is being detected as 22.9. Why?

I have a Lenovo IdeaPad U530. It has a 15.6" display. I was checking out iruler.net, and the website believes that my display is 22.9." http://www.infobyip.com/detectdisplaysize.php does the same thing.
How can I fix this? Is it a problem with my browser, or with my computer?
I will do some more digging while I wait for a response. Thanks guys.

Added (1). Update: Using Chrome, it is detected as 22.9." Using IE, it is detected as 18.4." *confusion intensifies*

Has anyone use skype with a phone or mobile game device?

I'm thinking of trying skype on my wife's Nokia Lumia 925, but their page isn't clear to me. Can anyone clarify this?

1. So if my wife downloads this for her Nokia 925 phone, and I'm home on my PC - a Lenovo ideapad z510, windows 8 - she
can send me a 'message' (not a call) for free?

2. Could her phone call my pc for free, or if not, what's the charge for that?

2. Could I use skype on something like a 3DS to send a message to her phone for free?