I have a Lenovo H520s, and it won't boot?

Hi, I have a Lenovo H520s, and two problems just appeared. First of all, it started to show "Start PXE over IPv4," then after waiting for a while "PXE-E18: Server response timeout. Start PXE over IPv6" would appear. A little bit later, the computer simply shows "Error 1962: No operating system found."

I went into the BIOS and I have Boot Mode set to "Auto" with UEFI first. I don't know where to go from here.

I recently used IOBit Uninstaller to uninstall all the software for my Epson WF-3540 scanner/printer and then reinstalled everything, and my only theory was that IOBit uninstaller deleted something that it should not have. This is probably the first time I have turned the computer off and on again since then.

Does anyone have any ideas?

What graphics card can I upgrade to with my specs?

I want to upgrade my graphics card but i'm not sure what graphics card i can safely use without the computer not being able to run it and me wasting money. I do not mid how much money i spend on a graphics card though. All i want is to have a nice fps in game, and be able to run games at highest settings, if possible of course. Anyways here are my specs.

Processor: Intel(R)Core(TM) i7-4790 CPU @ 3.60GHz

RAM: 16.0GB

Windows 8

Graphics Card: Intel(R) HD Graphics 4600

MotherBoard: Lenovo 10181

P.S. I'm not sure if that is my motherboard or if i did something wrong. Please let me know and I will fix it.

Lenovo G500- Can't record Microphone while playing a game?

Okay, so. I'm trying to record my screen video + audio as well as my webcam video + audio. I can record all except webcam audio. I use Mirillis Action! For my recording software (trial version) and I can easily record the screen video and audio and my webcam video. I have tried using different setting on Action, but to no avail. I tried using an old-ish Logitech stand-up, thin, microphone (not sure what exactly is the model/type), but there's no input jack on my Lenovo. I tried plugging in the microphone anyways, but when I launched the game, I could not hear the sound. Also, it did not work as a microphone input either. All I could see was the game screen and me talking without sound, looking very funny.
So, is there a way to fix this, or do I need to buy a USB-to-audio converter cord, or is there another way around this?
I have already searched some online about this problem, but I get no answers that are particular to my problem. I'm getting very frustrated and just want to record myself getting scared by the Outlast game and some others, and then post to YouTube. It blows my mind that Lenovo would not include an input jack, only having a headphone/output jack. Please help, any suggestions would be much appreciated, and I will vote best answer to the person who can provide a way to record all video and audio without me having to spend any money. If there's no such way I will vote the best answer to the next most useful solution/s.

Good monitor for reading?

Some led monitors hurt my eyes after extended use. And i'm a programming student. So i spend quite a while working on it. My current tn gaming monitor is uncomfortable when reading. So what specs should i be looking for? Any models recommendations?

Added (1). p.s. I like my ipad screen for reading very much (but can't use it for programming) and for monitors i hate think of f.e. Lenovo g500 monitor.

Humming Sound from Lenovo yoga?

I got a brand new Lenovo yoga, And there's a humming sound, and the fan is always on. Always. Is there any way to turn down the fan noise. Its quiet for a fan, but its always on. And to the humming noise, its different than the fan. Maybe the hard drive. Whatever it is its annoying. Other than that its a pretty good computer.