ESXi: Cannot start VM. Invalid MAC address specified. 12:34:6:78:90:12 is not an allowed static Ethernet address

Hi,

VMware vSphere does only allow to set MAC Addresses from the Range 00:50:56:00:00:00 up to 00:50:56:3f:ff:ff. You can set a static MAC out of this range but cannot start the virtual machine. The typical error message is:

Invalid MAC address specified. 12:34:6:78:90:12 is not an allowed static Ethernet address. It conflicts with VMware reserved MACs.
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Windows: Cannot access samba share as Guest

Hi,

since some later Versions of Windows 10 it is no longer possible to access Samba Public shares with Guest access as Windows User SYSTEM(i.e. from Schedule Tasks).

The error occured is:

The specified server cannot perform the requested operation.
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Windows: Renew a machine certificate

Hi,

in most Active Directory Enviroments the Certificate Enrollment is active which generates and enrolls a certificate for each client. This can be used for Radius authentication or as certificate for an IIS webserver.

Typically the client renews this certificate itself.
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Windows: Install Failure: Error 997. Overlapped I/O operation is in progress

Hi,

a customer tries to install .NET 4.6.2 and it ends up in error. Errors in the installer log:
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Powershell: Method not found: ‘System.Threading.Tasks.Task System.Threading.Tasks.Task.Run(System.Action)’

Hi,

when you tried to start powershell and the window opens and closes immediately.

Open a cmd and start powershell by calling powershell.exe
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