[解決済み] インストールに失敗し、エラーが発生した (Eclipse)

質問

インストールしようとすると、「installation failed with an error - show log」というエラーでインストールが終了してしまいます。

    [2017-04-03 20:33:34] Executing bootstrap tasks
[2017-04-03 20:33:34] Java(TM) SE Runtime Environment 1.8.0_121-b13
[2017-04-03 20:33:34] Product org.eclipse.products.epp.package.java.neon
[2017-04-03 20:33:34] Bundle org.eclipse.oomph.setup 1.6.0.v20161125-0947, build=2790, branch=33010448bcf5775ec23e485876cbb07a0340b9b5
[2017-04-03 20:33:34] Bundle org.eclipse.oomph.setup.core 1.6.0.v20161128-0928, build=2790, branch=33010448bcf5775ec23e485876cbb07a0340b9b5
[2017-04-03 20:33:34] Bundle org.eclipse.oomph.setup.p2 1.6.0.v20161019-0656, build=2790, branch=33010448bcf5775ec23e485876cbb07a0340b9b5
[2017-04-03 20:33:34] Performing P2 Director (Eclipse IDE for Java Developers (Neon))
[2017-04-03 20:33:34] Offline = false
[2017-04-03 20:33:34] Mirrors = true
[2017-04-03 20:33:34] Resolving 23 requirements from 3 repositories to D:\Nouveau dossier (2)\eclipse
[2017-04-03 20:33:34] Requirement epp.package.java [4.6.0,4.7.0)
[2017-04-03 20:33:34] Requirement org.eclipse.platform.feature.group [4.6.0,4.7.0)
[2017-04-03 20:33:34] Requirement org.eclipse.rcp.feature.group [4.6.0,4.7.0)
[2017-04-03 20:33:34] Requirement org.eclipse.buildship.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.egit.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.egit.mylyn.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.jdt.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.jgit.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.m2e.feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.m2e.logback.feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.mylyn.bugzilla_feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.mylyn.context_feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.mylyn.git.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.mylyn.hudson.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.mylyn.ide_feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.mylyn.java_feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.mylyn.wikitext_feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.mylyn_feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.recommenders.mylyn.rcp.feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.recommenders.rcp.feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.recommenders.snipmatch.rcp.feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.wst.xml_ui.feature.feature.group
[2017-04-03 20:33:34] Requirement org.eclipse.oomph.setup.feature.group
[2017-04-03 20:33:34] Repository http://download.eclipse.org/technology/epp/packages/neon
[2017-04-03 20:33:34] Repository http://download.eclipse.org/releases/neon/201703231000
[2017-04-03 20:33:34] Repository http://download.eclipse.org/oomph/updates/milestone/latest
[2017-04-03 20:33:37] Calculating requirements and dependencies.
[2017-04-03 20:33:37] Computing prerequisite plan
[2017-04-03 20:33:41] Collecting 1 artifacts from http://download.eclipse.org/technology/epp/packages/neon
[2017-04-03 20:33:42] Downloading epp.package.java.executable.win32.win32.x86_64
[2017-04-03 20:33:42] Collected 1 artifacts for http://download.eclipse.org/technology/epp/packages/neon in 0.669s
[2017-04-03 20:33:42] Collecting 3 artifacts from http://download.eclipse.org/releases/neon/201703231000
[2017-04-03 20:33:46] Downloading org.eclipse.platform_root
[2017-04-03 20:33:46] Downloading org.eclipse.rcp_root
[2017-04-03 20:33:46] Downloading org.eclipse.platform.ide.executable.win32.win32.x86_64
[2017-04-03 20:33:46] Collected 3 artifacts for http://download.eclipse.org/releases/neon/201703231000 in 3.681s
[2017-04-03 20:33:46] An error was detected while performing the engine operation and the changes are being rolled back. See the log for details.
[2017-04-03 20:33:46] ERROR: org.eclipse.equinox.p2.engine code=4 An error occurred during the org.eclipse.equinox.internal.p2.engine.phases.CheckTrust phase.
  at org.eclipse.oomph.util.OomphPlugin.coreException(OomphPlugin.java:280)
  at org.eclipse.oomph.p2.internal.core.ProfileTransactionImpl$3.commit(ProfileTransactionImpl.java:547)
  at org.eclipse.oomph.p2.internal.core.ProfileTransactionImpl.commit(ProfileTransactionImpl.java:340)
  at org.eclipse.oomph.setup.p2.impl.P2TaskImpl.perform(P2TaskImpl.java:729)

すべてのコードを書くことはできませんが、もしあなたが私を助けてくれるなら、そのようなものです。

どのように解決するのですか？

JDKも64ビットであることを確認し、ダウンロードしたEclipseのバージョンも64ビットであることを確認してください。すべて（システム、JDK、IDE）が64ビットと整合していないと、あらゆる種類の奇妙なエラーが発生し、IDEが起動しなくなります。

UPDATEしてください。

プラグインをインストールする際に問題が発生します。
こちらの投稿をご覧ください。

• プラグインをインストールしようとするとエラーになる

もし、そんなことはしたくないということであれば、素のEclipse（PD2プラグインが組み込まれていない、一般的なもの）をダウンロードし、マーケットプレイスを使って、必要なプラグインを手動で入手することをお勧めします。