Random bogging down leading to system freezing

Hi, how much free space do you have on C: ?
Could be a driver issue.. you could try
Enable and Disable Driver Verifier in Windows 10 | Tutorials

(Drivers are replaced when upgrading Windows)

Have you checked your BIOS is up to date?

Freezes are hard to identify. Try a clean boot and see if you still experience one.

What is the make/model of the laptop? 20Gb RAM is an unusual number. Is all the RAM exactly the same?
Speccy can help:
Download Speccy | Find your computer specs, free!

You can have 2 sets of specs..

Hi, congratulations, you've succeeded: from the tutorial

Driver Verifier is a diagnostic tool built into Windows 10, it is designed to verify both native Microsoft drivers and third party drivers. Driver Verifier's verification process involves putting heavy stress on drivers with the intention of making bad, outdated, incompatible or misbehaving drivers fail. The required result is a BSOD (Blue Screen of Death) which will generate a crash dump for debugging purposes.

You can do a disk check first (e.g. Hard disk Sentinel trial- the best text analysis I know of on its GUI) or HD Tune (Heath and Error scan tabs) - free - post the result.

If ok, run
chkdsk C: \scan
and post the result.

Then, with a link back to this thread, please see the posting instructions for the BSOD section of the forum, which require data collection with a tool.

The preferred way to post a screenshot is to use the Insert Image icon above your post.

Thanks, that's basics out of the way- best now to proceed with a BSOD post for detailed analysis.