BSOD, laptop only bootable from windows startup manager

Hey. I am pretty desperate right now, with only three days to a big exam. And that's why I'm making this post.

I bought this laptop in dec. 2013. Model is Lenovo Ideapad Y410P.
Specs:
Windows 8.1 64-bit
4th Generation Intel Core i7-4700MQ Processor (2.40GHz 1600MHz 6MB)
8.0GB PC3-12800 DDR3L SDRAM 1600 MHz
NVIDIA GeForce GT755M GDDR5 2GB
1TB 5400 RPM+24GB SSD
Intel® Wireless-N 7260 (802.11bgn)

After a while, completely out of the blue, i get a BSOD. I try pretty much everything to get it booting, and eventually it boots when i enter boot menu and boot from windows startup manager. By this point, i had already tried reinstalling windows.

Now that it's booted, it keeps showing "no bootable drive found" when I start the laptop. So the only way to get it working is repeating what i described above - every time. It also freezes pretty much every 10 minutes, and is frozen for the next 5-10 mins. Often, explorer.exe and other windows apps like taskmanager, device manager etc. will freeze, while chrome usually works. The weird thing though is that web pages don't load. I can open a tab, enter a web address, and the loading wheel starts spinning, but nothing happens. Also, I had an installer open during one freeze, and the green bar was frozen, but the install was complete when it unfroze, so it was working on that during the freeze.

I also have an unknown device in device manager, and found it to be this one: PCI Vendor and Device Lists
Googling for drivers renders no results, but I am currently installing all avaliable drivers from lenovos homepage.

BIOS version is according to lenovo not possible to upgrade, and is always latest version. (Dont know how that happens)

Before reinstalling, I took out the HDD, and copied all files to a stick. I scanned the drive, and its health is excellent. I have a hybrid drive, with two partitions. OS is on the HDD, so is startup.

Event viewer shows two critical events, logged in at the exact time when one of the freezes ended. Event is Event 10110, DriverFrameworks-UserMode.

Please let me know if there is more information I should include, and I would really appreciate any help!

EDIT: Adding some more from event viewer.
Errors:
Event 0, nlsX86cc [Translated description] Cannot find the description for Event-ID 0 from source nlsX86cc. The component causing this event is either not installed on the local computer, or the install is damaged.

The following information was included with the event:
Stop request seen
nlsX86cc error:0

Event 22, AppModel-Runtime
[Translated description] DeleteAppContainerProfile failed for AppContainer microsoft.windowscommunicationsapps_8wekyb3d8bbwe with the error 0x80070091.

20 x Event 20, WindowsUpdateClient
[Translated description] Install failed: The install of the following update failed with the error 0x80246007: Update for Windos 8.1 for x64-based Systems (KB2884846).

2x Event 10,AppReadiness
[Translated description] The appx-operation RemovePackageAsync on eBayInc.eBay_1.2.1.65_neutral__1618n3s9xq8tw failed because the user Joakim (This is me, and I'm admin) - Windows cannot remove eBayInc.eBay_1.2.1.65_neutral__1618n3s9xq8tw because the current user does not have that package installed. Use Get-AppxPackage to see the list of packages installed.. (Feil: Can't find package.)

Event 10, AppModel-State
[Translated description] Can't load the program settings for the package windows_ie_ac_001. Error code: 3

Event 32, AppModel-Runtime
[Translated description] The AppContainer-profile failed with the error 0x80070091 because it was impossible to delete the folder C:\Users\Joakim\AppData\Local\Packages\microsoft.windowscommunicationsapps_8wekyb3d8bbwe\AC or its content.

Event 46, volmgr
[Translated description] Initialization of crashdump failed!

Warning event logged once every minute:
Event 129, iaStorA
Reset to device, \Device\RaidPort0, was issued.

Event 1000, Application Error
Faulting application name: mmc.exe, version: 6.3.9600.16384, time stamp: 0x5215ef8f
Faulting module name: ntdll.dll, version: 6.3.9600.16408, time stamp: 0x523d5305
Exception code: 0xc0000374
Fault offset: 0x00000000000f387c
Faulting process id: 0x1f5c
Faulting application start time: 0x01cf71184192cd7b
Faulting application path: C:\windows\system32\mmc.exe
Faulting module path: C:\windows\SYSTEM32\ntdll.dll
Report Id: d4b03767-dd23-11e3-825b-28d24433c404
Faulting package full name:
Faulting package-relative application ID:

For starters, at work we start all repairs with a set of diagnostics. Often they find problems that weren't even expected. It's a waste of time to try to fix software on a system that has hardware problems.
Please try these free diagnostics for starters: Initial Hardware Diagnostics

This sounds like a hard drive problem to me, so the diagnostics are a good place to start.
If unable to boot to a bootable hard drive test, try running the corresponding Windows version of the test from within Windows.

Even though you haven't mentioned BSOD's, please provide this information so we can provide a complete analysis (from the Pinned Topic at the top of the forum): http://www.eightforums.com/bsod-cra...e-screen-death-bsod-posting-instructions.html Please use Option 1 as it provides Event Viewer logs.

Also, since it's difficult to get into Windows, let's grab this report also:
Please do the following:
- open Event Viewer (run eventvwr.msc from the "Run" dialog))
- expand the Custom Views category (left click on the > next to the words "Custom Views")
- right click on Administrative Events
- select "Save all Events in Custom View as..."
- save the file as Admin.evtx
- zip up the file (right click on it, select "Send to", select "Compressed (zipped) folder")
- upload it with your next post (if it's too big, then upload it to a free file-hosting service and post a link here).

While waiting for a reply, please monitor your temps with this free utility: HWMonitor CPUID - System & hardware benchmark, monitoring, reporting