It appears your Dell Latitude E6420 laptop was purchased new in October 2011 and came with Windows 7 Pro 32-bit.
It appears that Windows 10 Pro Version 1903 Build 18362 64-bit was installed in your laptop in August 2019.
Windows 10 tends to have issues (especially in laptops) when a third-party antivirus app is being used instead of Windows 10's built-in antivirus app.
How long has Symantec Endpoint Protection been installed in your laptop?
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It appears that Windows 10 Pro Version 1903 Build 18362 64-bit was installed in your laptop in August 2019.
Windows 10 tends to have issues (especially in laptops) when a third-party antivirus app is being used instead of Windows 10's built-in antivirus app.
How long has Symantec Endpoint Protection been installed in your laptop?
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