When I start zabbix_agent 64 bits on a Windows Server 2012 Standard 64bits, the problem bellow is showed:

zabbix_agentd.exe was stopped working

Problem signature:
Problem Event Name: APPCRASH
Application Name: zabbix_agentd.exe
Application Version: 2.4.1.49637
Application Timestamp: 5434dbdc
Fault Module Name: ntdll.dll
Fault Module Version: 6.2.9200.17313
Fault Module Timestamp: 5507a832
Exception Code: c0000018
Exception Offset: 00000000000e2100
OS Version: 6.2.9200.2.0.0.272.7
Locale ID: 1046
Additional Information 1: ac05
Additional Information 2: ac0507478d1c5bd693cfc4fe3987e900
Additional Information 3: ac05
Additional Information 4: ac0507478d1c5bd693cfc4fe3987e900

Read our privacy statement online:
http://go.microsoft.com/fwlink/?linkid=190175

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt

If I use the agent 32bit version, it works fine.

I've tested with 2.4.4 and 2.4.1 versions.