Hi, let us have some Pc specifications.
Check and post
TSG System Information Utility - found here.
http://static.techguy.org/download/SysInfo.exe
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Some reasons for
Blue Screens
New hardware or Software installed.
Device driver or Video driver, corrupted or faulty.
Faulty Ram - Overheating - Dying hard drive, etc.
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Two of your blue screens relate to memory management and Nvidia drivers.
Update Nvidia drivers and run a memtest.
Run memtest86
https://www.memtest86.com/download.htm
There is a free version.
Download the ISO file then burn to a DVD
Start the Pc using the DVD and run the memory test for at least 8 passes.
It is best to run a full scan on individual Ram sticks if you can.
Or run the test but if any errors are shown - then remove all sticks of Ram - test each Ram stick one at a time and test them in different slots.
It can also run from a USB stick - on the above website, scroll down to
''Image for creating bootable USB Drive - Download''
Guide to using Memtest86+
http://www.wikihow.com/Test-PC-Ram-with-MemTest86
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The hardware experts here will ask how long ago did you build this pc and please list all of the components that you bought including make and model numbers, etc.