My laptop won't connect to the internet? - 1

I have a Toshiba laptop. Last week, I was on my control panel uninstalling a few programs because the Toshiba Checkup app thing told me to do this regularly for things I don't need. Anyway, I think I must have accidentally deleted something essential for connecting to the internet, because after I shut down the laptop and turned it back on the next morning, Mozilla Firefox had a screen that said it couldn't find a connection and suggested a few things for me to try and get it back. I tried all of those. None worked. One and two were simple, telling me that I should correct my spelling or connect to a network, but three told me that maybe a proxy wasn't able to get through the firewall, so I tried that. I made sure Firefox had access beyond the firewall, and STILL it said it wasn't able to connect. It had been doing this for he past couple of days. Then I eventually restored my computer to go back before I had fiddled with uninstalling, and I was able to get online. After I closed Mozilla, however, the same message told me it wasn't able to connect when I opened it again. So I restored it once more and here I'm, taking advantage of its internet access while it lasts. I don't think it's our router, because all of my other devices can connect to the internet just fine. (other laptop, iPhone, iPad, etc.) Please, if you know what's wrong, help me get my stupid laptop to work again! XC
PS- I can add screenshots of anything if anyone needs them.

Found iPhone, can i activate it on my network?

I found an iphone at the mall like a year ago (forgot about it) and have tried to contact the person who it originally belonged to recently and have had no luck. I believe the phone was on T-Mobile. I have Verizon, so if I still can't find the owner, or assuming the owner found a new phone a year later. Would I be able to activate the phone onto my network? & how?

Added (1). It's an iPhone 4 btw

Added (2). Yeah i know, but if your iphone was unlocked and you had a tmobile sim card you could activate it on tmobile (i've done it before) is there NO way possible? The phone has a sim card slot so it's GSM, could i just change the sim? Or do i have to jailbreak it?

Downloading music to itunes?

I heard a song I really liked that wasn't on itunes, so I wanted to download it onto my phone. I went to http://www.video2mp3.net and put in the link to the song, and it downloaded to my itunes on my computer. I looked for it in my itunes store on my phone and it wasn't there. I'm really bad at anything that has to do with technology so what do I do next? If it makes a difference, I have an iPhone.

IPhone 4s white or Samsung Galaxy S3 mini?

Okay so my contract for my blackberry is up in a couple of days and I need to get a different phone desperately! I really want the iphone but I'm not 100% that I'll be allowed it. But I definitely know I'll be allowed the samsung because they are a bit cheaper arent they? And I wouldnt want an iphone any older than the 4s.

How to upload videos to youtube from my iphone?

Ok so it doesn't seem like I can upload a video within the youtube app or mobile site? Which is stupid… I know I'm able to upload to youtube from my camera roll but the problem is I don't know my user name? Since my youtube account is linked with my gmail account idek my username! When I sign in I just use my email address but that's not an option from the camera roll. From there i have to use my username.

- I signed out of my youtube account from the mobile site and clicked the option to send me my own username but I just got an email with a link. No information about my username. Help? Do I have to just make an actual youtube account that's not with my gmail? Ugh

Does metro pcs sell iPhones?

*WARNING* Be prepared for a background story: i'm like so freakin pissed right now… Anyway, this whole day i've been jumping around the house basically anxious for my parents, & i's iPhones to finally arrive today (as said in the email). I keep looking out the window excitedly. When suddenly i hear the doorbell ring i'm like "aaaaaaaaaaaaah!"… But it's my dad (lol) that's gr8 too but yah know. & he's all mad b/c of something @ work & so i steer clear cuz i dnt wanna get on his bad side & my mom's talking to him about the situation. Then suddenly i start hearing them talking about the phones, and i'm like ok i know i shouldn't interrupt but i just have too i can't take it anymore. So then suddenly i hear him say "we're switching to metro" & it's like my whole world collides & i say "dad, please no, why?" he says because he's not ready to end up paying 3, 000 dollars b/c they're limited, especially w/ phones like the one we're expected to get, & i don't really understand what he means by that i'm like so… Why don't we just get unlimited? & he says the people of sprint say they don't offer us unlimited & i'm like huh? What? But? Then he says so i'm switching to metro pcs and we're getting iPhone 5's from them since they offer true unlimited for everything. & i go dad metro pcs sucks! They don't even have iPhones! (i've never experienced metro b4, but i just really wanna stick with sprint!) & then the thought comes into mind… Wait do they sell the iPhone? & that's why i'm here 2day.

Can I use iTunes on a chromebook somehow?

I recently bought a chromebook for myself after my old laptop broke. I have an iPhone and every time I try to download iTunes onto the chromebook, it downloads, but can't open the software.So, I was wondering if there was a way I could use iTunes without downloading the software, or if - preferably - there was a way I could download and use iTunes on my chromebook. Any help or suggestions would be greatly appreciated!