# 7.9.3 Elasticsearch Installation Error
**URL:** https://discuss.elastic.co/t/7-9-3-elasticsearch-installation-error/303175
**Category:** Elasticsearch
**Created:** [April 25, 2022, 3:10pm UTC](https://discuss.elastic.co/t/7-9-3-elasticsearch-installation-error/303175 "2022-04-25T15:10:24Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Parvi](https://discuss.elastic.co/u/Parvi)
#### Post date: [April 25, 2022, 3:10pm UTC](https://discuss.elastic.co/t/7-9-3-elasticsearch-installation-error/303175/1 "2022-04-25T15:10:24Z")
I am getting this error tryin to install Elasticsearch 7.9.3 on my Windows system. Please suggest.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/logging/log4j/core/config/properties/PropertiesConfigurationFactory
at org.Elasticsearch.cli.CommandLoggingConfigurator.configureLoggingWithoutConfig(CommandLoggingConfigurator.java:40)
at org.Elasticsearch.cli.Command.main(Command.java:87)
at org.Elasticsearch.common.settings.KeyStoreCli.main(KeyStoreCli.java:43)
Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.core.config.properties.PropertiesConfigurationFactory
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:606)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:168)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 3 more
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/logging/log4j/core/config/properties/PropertiesConfigurationFactory
at org.Elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:90)
Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.core.config.properties.PropertiesConfigurationFactory
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:606)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:168)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 1 more
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [April 26, 2022, 12:57am UTC](https://discuss.elastic.co/t/7-9-3-elasticsearch-installation-error/303175/2 "2022-04-26T00:57:17Z")
Welcome to our community! 😃
It'd be useful if you could share your entire Elasticsearch log, from when it starts up to this error. Please format your code/logs/config using the `` button, or markdown style back ticks. It helps to make things easy to read which helps us help you 🙂
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 24, 2022, 12:57am UTC](https://discuss.elastic.co/t/7-9-3-elasticsearch-installation-error/303175/3 "2022-05-24T00:57:53Z")
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