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In your event logs there are many events about an error detected on Harddisk4 DR4, since you have multiple storage devices & I'm not sure how Windows looks at it to specify which of them is causing this problem I suggest that you test your HDD & SSDs and update the firmware of the SSDs.
Run SeaTools to check the integrity of your HDD. SeaTools for DOS and Windows - How to Use - Windows 7 Help Forums
Run following tests
- Short Drive Self Test
- Short generic
- Long generic
If the short generic fails, no need for the long generic.
Do not run SeaTools on an SSD as the results will be invalid.
Post screenshots/photos of the test results
Run HDTune to
- scan for errors, no quick scan but full scan
- check the health,
It may take some time, but please take the time you need to perform it properly.
Let me know what the results are
- of the error scan,
- make a screenshot of the health of every hard drive and post the screenshots,
- post screenshots with the benchmark of the
- transfer rate,
- access time,
- burst rate,
- cpu usage.
Best is to make screenshots/photos of these test results too.
Log Name: System
Event ID: 51
User Name: N/A
An error was detected on device \Device\Harddisk4\DR4 during a paging operation.