So after "googling" for fixes, which many different ones come up in various places...
[dt@dt-pc ~]$ sudo pacman -S archlinux-keyring
warning: archlinux-keyring-20181218-1 is up to date -- reinstalling
1/1) reinstalling archlinux-keyring [############################] 100%
==> Appending keys from archlinux.gpg...
==> Locally signing trusted keys in keyring...
-> Locally signing key DDB867B92AA789C165EEFA799B729B06A680C281...
-> Locally signing key 684148BB25B49E986A4944C55184252D824B18E8...
-> Locally signing key 91FFE0700E80619CEB73235CA88E23E377514E00...
-> Locally signing key 0E8B644079F599DFC1DDC3973348882F6AC6A4C2...
-> Locally signing key AB19265E5D7D20687D303246BA1DFB64FFF979E7...
==> Importing owner trust values...
==> Disabling revoked keys in keyring...
-> Disabling key 8F76BEEA0289F9E1D3E229C05F946DED983D4366...
-> Disabling key 63F395DE2D6398BBE458F281F2DBB4931985A992...
-> Disabling key 50F33E2E5B0C3D900424ABE89BDCF497A4BBCC7F...
-> Disabling key 27FFC4769E19F096D41D9265A04F9397CDFD6BB0...
-> Disabling key 39F880E50E49A4D11341E8F939E4F17F295AFBF4...
-> Disabling key 8840BD07FC24CB7CE394A07CCF7037A4F27FB7DA...
-> Disabling key 5559BC1A32B8F76B3FCCD9555FA5E5544F010D48...
-> Disabling key 0B20CA1931F5DA3A70D0F8D2EA6836E1AB441196...
-> Disabling key 07DFD3A0BC213FA12EDC217559B3122E2FA915EC...
-> Disabling key 4FCF887689C41B09506BE8D5F3E1D5C5D30DB0AD...
-> Disabling key 5A2257D19FF7E1E0E415968CE62F853100F0D0F0...
-> Disabling key 7FA647CD89891DEDC060287BB9113D1ED21E1A55...
-> Disabling key BC1FBE4D2826A0B51E47ED62E2539214C6C11350...
-> Disabling key 4A8B17E20B88ACA61860009B5CED81B7C2E5C0D2...
-> Disabling key 5696C003B0854206450C8E5BE613C09CB4440678...
-> Disabling key 8CF934E339CAD8ABF342E822E711306E3C4F88BC...
-> Disabling key F5A361A3A13554B85E57DDDAAF7EF7873CFD4BB6...
-> Disabling key 5E7585ADFF106BFFBBA319DC654B877A0864983E...
-> Disabling key 65EEFE022108E2B708CBFCF7F9E712E59AF5F22A...
-> Disabling key 40440DC037C05620984379A6761FAD69BA06C6A9...
-> Disabling key 34C5D94FE7E7913E86DC427E7FB1A3800C84C0A5...
-> Disabling key 81D7F8241DB38BC759C80FCE3A726C6170E80477...
-> Disabling key E7210A59715F6940CF9A4E36A001876699AD6E84...
-> Disabling key 5357F3B111688D88C1D88119FCF2CB179205AC90...
-> Disabling key FB871F0131FEA4FB5A9192B4C8880A6406361833...
-> Disabling key 66BD74A036D522F51DD70A3C7F2A16726521E06D...
-> Disabling key B1F2C889CB2CCB2ADA36D963097D629E437520BD...
-> Disabling key 9515D8A8EAB88E49BB65EDBCE6B456CAF15447D5...
-> Disabling key 40776A5221EF5AD468A4906D42A1DB15EC133BAD...
-> Disabling key D4DE5ABDE2A7287644EAC7E36D1A9E70E19DAA50...
-> Disabling key 44D4A033AC140143927397D47EFD567D4C7EA887...
==> Updating trust database...
gpg: next trustdb check due at 2019-01-31
Then did this one...
[dt@dt-pc ~]$ sudo pacman -Suu
Then had issues, then got
:: Proceed with installation? [Y/n] y
:: Retrieving packages...
libldap-2.4.47-1-x86_64 282.6 KiB 368K/s 00:01 [############################] 100%
(295/295) checking keys in keyring [############################] 100%
(295/295) checking package integrity [############################] 100%
error: qpdfview: key "Alad Wenter <alad@archlinux.org>" is disabled
:: File /var/cache/pacman/pkg/qpdfview-0.4.18beta1-1-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: failed to commit transaction (invalid or corrupted package)
Errors occurred, no packages were upgraded.
[dt@dt-pc ~]$ sudo pacman-key --edit-key alad
pub ed25519/6BC26A17B9B7018A
created: 2017-09-07 expires: 2019-03-29 usage: SC
trust: unknown validity: full
*** This key has been disabled
sub cv25519/56BC98A0ED1781EB
created: 2017-09-07 expires: 2019-03-29 usage: E
[ full ] (1). Alad Wenter <alad@archlinux.org>
[ revoked] (2) Alad Wenter <alad@mailbox.org>
[ revoked] (3) Alad Wenter <alad@archlinux.info>
[marginal] (4) [jpeg image of size 23265]
gpg> enable
gpg> save
Key not changed so no update needed.
==> Updating trust database...
gpg: marginals needed: 3 completes needed: 1 trust model: pgp
gpg: depth: 0 valid: 1 signed: 22 trust: 0-, 0q, 0n, 0m, 0f, 1u
gpg: depth: 1 valid: 22 signed: 99 trust: 0-, 0q, 0n, 22m, 0f, 0u
gpg: depth: 2 valid: 96 signed: 17 trust: 96-, 0q, 0n, 0m, 0f, 0u
gpg: next trustdb check due at 2019-01-31
Then tried...
[dt@dt-pc ~]$ sudo pacman -Syu
Then got...
Total Installed Size: 2099.08 MiB
Net Upgrade Size: 234.59 MiB
:: Proceed with installation? [Y/n] y
(295/295) checking keys in keyring [############################] 100%
(295/295) checking package integrity [############################] 100%
(295/295) loading package files [############################] 100%
(295/295) checking for file conflicts [############################] 100%
error: failed to commit transaction (conflicting files)
filesystem: /etc/artix-release exists in filesystem
Errors occurred, no packages were upgraded.
[dt@dt-pc ~]$
Ah yes, the wonderful fun-filled gamed of play pin tail on donkey with many "guess" fixes from google searches... lol