{"id":969,"date":"2017-12-02T06:57:55","date_gmt":"2017-12-02T06:57:55","guid":{"rendered":"http:\/\/www.scmgalaxy.com\/tutorials\/?p=969"},"modified":"2020-01-09T09:25:10","modified_gmt":"2020-01-09T09:25:10","slug":"installation-mechanism-in-windows-installer","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/installation-mechanism-in-windows-installer\/","title":{"rendered":"Installation Mechanism in Windows Installer"},"content":{"rendered":"<p><strong>rajeshkumar created the topic: Installation Mechanism in Windows Installer<\/strong><br \/>\nThere are two phases to a successful installation process: acquisition and execution. If the installation is unsuccessful, a rollback phase may occur.<\/p>\n<p>Acquisition<br \/>\nAt the beginning of the acquisition phase, an application or a user instructs the installer to install a feature or an application. The installer then progresses through the actions specified in the sequence tables of the installation database. These actions query the installation database and generate a script that gives a step-by-step procedure for performing the installation.<\/p>\n<p>Execution<br \/>\nDuring the execution phase, the installer passes the information to a process with elevated privileges and runs the script.<\/p>\n<p>Rollback<br \/>\nIf an installation is unsuccessful, the installer restores the original state of the computer. When the installer processes the installation script it simultaneously generates a rollback script. In addition to the rollback script, the installer saves a copy of every file it deletes during the installation. These files are kept in a hidden, system directory. Once the installation is complete, the rollback script and the saved files are deleted. For more information<br \/>\nRegards,<br \/>\nRajesh Kumar<br \/>\nTwitt me @ <a href=\"http:\/\/twitter.com\/RajeshKumarIn\" target=\"_blank\" rel=\"noopener\">twitter.com\/RajeshKumarIn<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>rajeshkumar created the topic: Installation Mechanism in Windows Installer There are two phases to a successful installation process: acquisition and execution. If the installation is unsuccessful, a rollback phase may&#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[49],"tags":[245],"class_list":["post-969","post","type-post","status-publish","format-standard","hentry","category-general","tag-mechanism"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/969","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=969"}],"version-history":[{"count":1,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/969\/revisions"}],"predecessor-version":[{"id":970,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/969\/revisions\/970"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}