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Unrecoverable Error during Install

Right at the beginning of me trying to install TOAD-SQL Server, I get the following error:

"This package installation failed because the MSI installer internal unknown error."

I have downloaded the MSI several times, but I always get this error.

All hard/software requirements are met and validated by the installer and myself manually based on documentation.

I am lost as to the error.

Error in log file is (partial) :

[2F54:09E8][2020-08-31T12:00:02]e000: Error 0x80070643: Failed to install MSI package.
[2F54:09E8][2020-08-31T12:00:02]e000: Error 0x80070643: Failed to execute MSI package.
[4214:20A0][2020-08-31T12:00:02]e000: Error 0x80070643: Failed to configure per-machine MSI package.
[4214:20A0][2020-08-31T12:00:02]i000: ThreadID:[1]:EventName:[ExecutePackageComplete] Package=[ToadforSQLServer_7.1.0.142_x64_En.msi, Status=[0x80070643]
[4214:20A0][2020-08-31T12:00:02]i000: ThreadID:[1]:EventName:[Error]
[4214:20A0][2020-08-31T12:00:02]i319: Applied execute package: ToadforSQLServer_7.1.0.142_x64_En.msi, result: 0x80070643, restart: None
[4214:20A0][2020-08-31T12:00:02]e000: Error 0x80070643: Failed to execute MSI package.
[4214:20A0][2020-08-31T12:00:02]i000: ThreadID:[1]:EventName:[ExecutePackageBegin]
[4214:20A0][2020-08-31T12:00:02]i000: ThreadID:[1]:EventName:[ShowExecutePackageBegin] the enginepackage count is [3]
[2F54:09E8][2020-08-31T12:00:02]i318: Skipped rollback of package: ToadforSQLServer_7.1.0.142_x64_En.msi, action: Uninstall, already: Absent
[4214:20A0][2020-08-31T12:00:02]i000: ThreadID:[1]:EventName:[Progress]

THX in advance for any help