Why doesn't my laptop start?

I have a Lenovo ThinkPad and it was working fine, it used to be my cousin's and it worked perfectly. One day, I came home and turned it on and I left it there because I had to do something (I always did that. Nothing new) and I came back after a while and it was still in the windows starting screen. I thought it was weird but I said that maybe it was normal. I came back after a while again and it was still there so I turned it off from the button. And then I turned it back on and it still did the same. I talked to one of my cousins and he erased everything I had in the laptop thinking maybe it was a virus or something but it kept doing the same. He did some research and told me what it could be but he said he wasn't 100% sure about it. If someone knows what it is please tell me. I really need my computer for school and I don't wanna waste alot money.

Laptop Won't Initialize Login Screen Sometimes?

I have this laptop: Lenovo Thinkpad W540 Laptop, Intel Core i7-4700MQ, FHD,32GB,512GB SSD, Nvidia

Sometimes when I restart my computer the login screen doesn't initialize. I have done some weird things to get it to work.

I restart, un-plug everything (headphones, mouse, etc.) and it will initialize it, but with them in, it won't. What's up? I have a 3 year warranty, so should I use it?

Can this computer run SWTOR (Star Wars the Old Republic)?

SWTOR is a pretty intense MMO and I was wondering if a Lenovo Flex 2 15.6-inch Full-HD 1080p Multimode Touchscreen Laptop - Intel Core i7-4510U 2.0 GHz, 16 GB RAM, 4 GB Dedicated Graphics, 1 TB HDD, HDMI, Webcam, Bluetooth, Wi-Fi, Windows 8.1 could run it, and if so how well (and if possible on what graphics setting).

Added (1). The graphics card is the Nvidia G820
The graphics card RAM type is DDR3 SDRAM
Graphics Card Ram Size is 4 GB

Laptop Buzzing Through Speakers?

I have a brand new Lenovo G50-30 (literally got it today) and it works fine, however, when I watch videos on Youtube there's an occasional slight freeze and a buzzing noise. It's a problem my old laptop had too, which was a HP. I've turned off the microphone, but I don't know what else to do, or what may be causing it, as it's freakin' new.

Lenovo laptop not picking up Wi-Fi?

It only worked when I plugged in an enthernet cable. But for the past days I've been getting "no Internet connection", when I plugged it in. Then few minutes later its back to "connected to internet" then "no Internet connection" again. And my internet/router is not the problem.

Getting shocked by Lenovo Ideapad y510p when plugged in?

So i have this laptop which i bought about 4 months ago. Whenever i touch on the back of the lid (the side where is logo is) while it is plugged in i get this tingling sensation, like the surface kind of loses its smoothness and becomes rough. This does not happen when it is not plugged in. However, when in contact with the floor (no carpet, not wooden flooring, just plain marble floor) regardless of where i touch the laptop, i get a shock strong enough to make me pull my finger back instantly. This happens only when i'm directly in contact with the floor. I do not get shocks if i'm wearing any footwear or if i'm standing on a carpet or wooden floor. I noticed this problem ever since i got this laptop but i did not think it was a serious issue. So my questions are (1) Is this a common thing with laptops while being plugged in? (2) If not, what can i do to fix this?

Can laptops be good for gaming?

I want to get a laptop and I'll be using it for primarily gaming. Are there any good gaming laptops out there? I have a desktop already but I want something portable. Is it worth