SCCM SCAN error Same as HTTP status 401 - the requested resource requires user authentication.

Same as HTTP status 401 - the requested resource requires user authentication.

reset proxy to fix the issue.

netsh winhttp reset proxy

SCCM Client Installation error 1638 for VC_redist.x64.exe

SCCM Client Installation error 1638 for VC_redist.x64.exe

1638 meaning:

Another version of this product is already installed. Installation of this version cannot continue. To configure or remove the existing version of this product, use Add/Remove Programs on the Control Panel.

Uninstall the latest version from the machine and install the pre req as per MS.

Pre-req as per MS is old version than some of the machines in our network. 

"C:\ProgramData\Package Cache\{7f336035-fa39-4d06-bd17-fbf472a381e8}\VC_redist.x64.exe" /uninstall /quiet /norestart 

"C:\ProgramData\Package Cache\{9120a466-433b-4dd9-a5e0-3092abd2cc1d}\VC_redist.x86.exe" /uninstall /quiet /norestart 

"C:\ProgramData\Package Cache\{43d1ce82-6f55-4860-a938-20e5deb28b98}\VC_redist.x64.exe" /uninstall /quiet /norestart 

"C:\ProgramData\Package Cache\{fa7f6d52-f85e-48ef-8f56-a37268aa5772}\VC_redist.x64.exe" /uninstall /quiet /norestart 

"C:\ProgramData\Package Cache\{4b2f3795-f407-415e-88d5-8c8ab322909d}\VC_redist.x64.exe" /uninstall /quiet /norestart 

How to disable Metered network

Here is Network Card connection metered information:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DusmSvc\Profiles\{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}\* in REG_DWORD name UserCost indicate if metered or not

with {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX} your Network Card GUID

and

UserCost = 0 when Metered is off

UserCost = 2 when Metered is on

You need to restart "Data Usage" Service DusmSvc before your settings take effect