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QGA installer uses rundll32 to run the DLLCOMRegister function from qga-vss.dll and perform VSS provider registration. rundll32 ignores the return value of the function and always exits with a zero exit code. This causes a situation where the installer does not know the status of VSS provider registration. This commit forces to change exit code when the VSS provider registration fails. https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/rundll32 Reviewed-by: Yan Vugenfirer <yvugenfi@redhat.com> Tested-by: Dehan Meng <demeng@redhat.com> Message-ID: <20250620083132.28347-1-kkostiuk@redhat.com> Signed-off-by: Kostiantyn Kostiuk <kkostiuk@redhat.com>