Computer slow after transporting it?

I have a Lenovo Y510p laptop and the other day I brought it over my friends house to watch a movie. When I got back home something was wrong. It is much slower in pretty much every aspect. Browsing the internet, playing games, etc. Judging by what I've read on the internet some people think that the sudden change in performance could mean something is loose internally due to me moving the laptop. I already took off the case and checked within but I really have no idea what i'm looking for. Any thoughts?

Core i3 (4th Gen), Core i5 (4th Gen) or APU Quad Core A6? Need a new laptop?

Hi, I'm planning to buy a new laptop for my college. I'm pretty much a tech-noob and was wondering if anyone could help me out with choosing the processor that will meet my requirements. My requirements as any college student revolves around fast responsiveness, decent battery life, good quality video running and other features related to the college life such as memory, back up etc.
I have narrowed my search to three laptops under by budget. Following are the links:

http://www.flipkart.com/...134bb789f7

http://www.flipkart.com/...h)_(Black)

http://www.flipkart.com/...2)_(Black)

I personally prefer the Windows 8.1 lenovo flex as it looks way better than the other two and also supports touch screen. However all three laptops have different processors of which I know too little to make a comprehensive decision. Which one would be the best one for me?

Added (1). If anyone can't open the links, the laptops are as follows:

Lenovo Flex 2-14D Notebook (APU Quad Core A6/ 4GB DDR RAM/ 500GB HDD/8GB SSD/ Win8.1)

DELL INSPIRON 15 3537 LAPTOP (4TH GEN CI3/ 2GB/ 500GB/ WIN8.1/ 1GB GRAPH)

ACER ASPIRE E1-572 LAPTOP (4TH GEN CI5/ 4GB/ 500GB/ LINUX) (NX.M8ESI.002)

How much does a laptop repair usually cost?

So I have a Lenovo laptop and I'm not sure if it was because of the programs I had on that it was to much for my laptop but my laptop froze and I had to shut it down by holding the power button and when I started it up again, it was stuck at the loading screen with the windows logo. How much will It take to repair It and how Long? Or any suggestions on how to fix it?

Which laptop for college?

Lenovo Ideapad U430 vs. Lenovo Yoga 2 Pro vs. Asus Zenbook

- Science student
- Basic net surfing and browsing (LOTS of research)
- Mild gaming
- Stream/watch shows and movies

Not interested in Chromebooks, Acer or Dell… Open to other suggestions… Thanks!
Also, it'd be nice if it was less than 15". Thank you!

Added (1). Also, we read a lot of PDFs, so a reader would be nice with good screen resolution (which I've seen all of them have)

Which laptop for college? - 2

Lenovo Ideapad U430 vs. Lenovo Yoga 2 Pro vs. Asus Zenbook

- Science student
- Basic net surfing and browsing (LOTS of research)
- Mild gaming
- Stream/watch shows and movies

Not interested in Chromebooks, Acer or Dell… Open to other suggestions… Thanks!
Also, it'd be nice if it was less than 15". Thank you!

Added (1). And we read a lot of PDFs… So added Acrobat Viewer would be nice. I know they all have nice screen resolutions.

Which laptop for college? - 1

Lenovo Ideapad U430 vs. Lenovo Yoga 2 Pro vs. Asus Zenbook

- Science student
- Basic net surfing and browsing (LOTS of research)
- Mild gaming
- Stream/watch shows and movies

Not interested in Chromebooks, Acer or Dell… Open to other suggestions… Thanks!

Added (1). Also, it'd be nice if it was less than 15". Thank you!

Added (2). Also will be using to read and scroll through PDFs. Added reader = bonus. I know they all have good screen resolutions.

Keyboard problem Windows 8.1?

Ok My OS is Windows 8.1… My keyboard is AZERTY but the controls are marked in English.( Caps Lk delete etc) The ABCD… And 1234… Keys are normal but the punctuation keys are all over the place… Hence impossible to type… I'm using it in French
I just bought this laptop Lenovo T410 2nd hand and don't know Windows 8… Please How do I fix it.