Hi again ....
Any luck yet? That Cumulative Update also contained some Windows Apps updates, at least one that concerned the Windows Store app ... if you haven't grabbed that update yet, run Windows Update and see if anything improves.
Recent Error logs:
ShellExperienceHost errors
--> Some older graphics cards & drivers can't provide the fancier elements of the newer Windows 10 Shell. To help your older card work better with Windows 10, try the following:
1) Click or tap the Windows 10 Start Menu icon
2) Select Settings
3) Select Personalization
4) Select Colors
5) In the "Choose a Color" section, turn OFF: "Automatically pick an accent color from my background".
............................................... turn OFF: "Show color on Start, Taskbar, Action Center, and Title bar"
................................................turn OFF: "Make Start, Taskbar, and Action Center transparent"
6) Exit Personalization (click the X in the upper right corner of the Personalization window)
KMS errors
---> These errors were filling the logs quite a lot earlier. Oddly enough, even though you removed the KMS Nano software, KMS errors are still filling the logs in April. If you have already uninstalled the KMS software, use File Explorer to navigate to any KMS folders in the folders --- Program Files, Program Files (x86), and ProgramData (note that to see the ProgramData folder, in File Explorer you'll have to place a checkmark in the View folder-option-box "hidden items") --- and delete the KMS folders. Remove any KMS entries in the Startup tab of Task Manager also. Then try a run of Pirisofts's CCleaner - let it remove unnecessary temporary files with its Cleaner function, and run the Registry Cleanup a few times, until it reports no changes to be made. Let CCleaner make a backup of it's Registry changes, in case you wish to revert any of these (it has extensive "UnDo" functions).
..........If by any chance you reinstalled the KMS software, uninstall it again, and check their support website (if there is one) to see if a more Windows 10 compatible version is available or planned. Then in CCleaner's settings/options menus, turn off any system monitoring settings or automatic updates settings. It's nice to have around for specialized cleanups, but it doesn't need to run continuously. When it's needed, it can be updated then (if ever).
ACDSee video software errors
---> Check to see if there are any updates to help this older program get along with Windows 10. If not, try uninstalling it, then re-installing it - but this time, instead of running it's installer file ("install.exe" or "install.msi") directly, INSTEAD -- Right-click its installer file & select Properties, and select the Compatibility tab, then select Compatibility Mode for the version of Windows for which your version of ADCSee was written - then install it.
Serious STOP Errors ("BSODs", "Blue Screen of Death" errors)
Intel 945G Graphics driver (igdkmd64.sys)
Uninstall whatever Intel 945G driver is in use now, and restart the computer. Hopefully Windows 10 will reinstall a basic non-toxic driver that won't cause a blue screen. If need be, I'll help you try hunting down one more compatible with Windows 10.
Norton (Symantec) antivirus (symefasi64.sys)This is just one of several Symantec program errors --- there were quite a few in the earlier logs as well. This one was serious enough to cause a blue screen. Check for updates to your Norton/Symantec software that help it with Windows 10 compatibility, or switch to something else.
Kernel errors (ntkrnlmp.exe) - four system crashes
These errors happened deep in the guts of Windows 10, generally suggesting either a hardware error - in this case, usually system memory error - or a highly privileged driver error. I've recommended testing the memory: these errors suggest a higher urgency in such a test .... Memory diagnostics using MemTest86+ are very easy to do (just turn on the diagnostic and let it run overnight) ...and should either detect a memory problem, or rule out any memory problem.
I've attached a document that includes summary overviews of the last six memory dumps from STOP errors.
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You've mentioned that, with the exception of the malfunction of Mail and Calendar, your system is running reasonably smoothly. But the error logs show that there has been trouble brewing below the surface. The good news is that -- since your last major round of changes (just before April) -- the accumulation of general application errors has slowed down (with the three main error-producers mentioned above). So, it the hardware proves OK, the software should be fixable.
After you have a chance to make the changes to fix the above error sources (adjusting the Personalization Color settings, Removing KMS leftovers, updating-or-installing-in-Compatibility-Mode ACDSee video software, changing the 945G driver, fixing Norton/Symantec, and running memory diagnostics) .... If the diagnostics prove the memory is OK: the next step for repairing Mail & Calendar is below.
Manually Remove Mail & Calendar
1) Click on the Windows 10 Start Menu icon
2) Select All Apps
3) Select the Windows PowerShell folder
4) Right-click Windows PowerShell and select "run as administrator"
5) In the PowerShell prompt, type Get-AppxPackage *windowscommunicationsapps* | Remove-AppxPackage
6) Exit PowerShell
7) Restart the computer
Reinstall Mail and Calendar from the Windows Store
Since using PowerShell commands to reinstall these didn't work last time, this time search in the Windows Store for them (they will likely be listed as one download/install item "Mail and Calendar".
Note: you must connect your Windows 10 installation to a Microsoft account to use the Windows Store. You can create a new, free Microsoft account using any valid email address ... it does not have to be a hotmail.com or outlook.com or microsoft.com account. Visit the Accounts applet in the Windows 10 Settings app to do that (available from the Start Menu).
I'd have to say that the first priority would be the memory diagnostics. I imagine that Symantec software would be happier with more than 2 GB of system memory, too.
Cheers