{"id":12664,"date":"2025-04-15T17:16:01","date_gmt":"2025-04-16T00:16:01","guid":{"rendered":"https:\/\/www.coretechnologies.com\/blog\/?p=12664"},"modified":"2025-04-15T17:16:01","modified_gmt":"2025-04-16T00:16:01","slug":"w32time","status":"publish","type":"post","link":"https:\/\/www.coretechnologies.com\/blog\/windows-services\/w32time\/","title":{"rendered":"Essential Windows Services: Windows Time \/ W32Time"},"content":{"rendered":"<div align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"no-lazy-load\" src=\"\/blog\/images\/windows-time-service-150x150.webp\" title=\"Windows Time Service\" alt=\"Windows Time Service\" border=\"0\" width=\"150\" height=\"150\" \/><\/div>\n<div id=\"blog-toc-container\" style=\"margin-top:20px;\">\n<p id=\"blog-toc-title\">In this article&#8230;<\/p>\n<ul>\n<li><a href=\"#what-is-w32time-service\">What is the Windows Time (W32Time) service?<\/a><\/li>\n<li><a href=\"#stop-windows-time-service\">What happens if I stop W32Time?<\/a><\/li>\n<li><a href=\"#ok-to-disable-w32time\">Is it OK to disable the Windows Time service?<\/a><\/li>\n<li><a href=\"#windows-time-service-questions\">Questions? Problems?<\/a><\/li>\n<\/ul>\n<\/div>\n<p><a name=\"what-is-w32time-service\"><\/a><\/p>\n<h2 class=\"blog-caption\">What is the Windows Time (W32Time) service?<\/h2>\n<p>The Windows Time service (W32Time) implements the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Network_Time_Protocol\" target=\"_blank\">Network Time Protocol (NTP)<\/a> specification to synchronize the date and time of computers managed by <a href=\"https:\/\/learn.microsoft.com\/en-us\/windows-server\/identity\/ad-ds\/get-started\/virtual-dc\/active-directory-domain-services-overview\" target=_blank\">Active Directory (AD)<\/a>.<\/p>\n<p>It may not be obvious but keeping the clock accurate and synchronized with the rest of the domain is an essential task. That&#8217;s because modern authentication methods (like <a href=\"https:\/\/learn.microsoft.com\/en-us\/openspecs\/windows_protocols\/ms-kile\/b4af186e-b2ff-43f9-b18e-eedb366abf13\" target=\"_blank\">Kerberos V5<\/a>) may fail when networked machines are not coordinated. As such, <b>W32Time plays a key role on computers joined to Active Directory<\/b>. Otherwise, it&#8217;s not really important.<\/p>\n<p>The Windows Time service runs as <a href=\"https:\/\/learn.microsoft.com\/en-us\/windows\/win32\/services\/localsystem-account\" target=\"_blank\">LocalSystem<\/a> inside the service host process, <a href=\"https:\/\/en.wikipedia.org\/wiki\/Svchost.exe\" target=\"_blank\">svchost.exe<\/a>:<\/p>\n<div align=\"center\"><a href=\"\/blog\/images\/w32time-windows-service.png\" class=\"zoomPopup\" title=\"W32Time Windows Service\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"image-padding\" src=\"\/blog\/images\/w32time-windows-service.png\" title=\"W32Time Windows Service (click to enlarge)\" alt=\"W32Time Windows Service\" border=\"0\" \/><\/a><\/div>\n<p>And because the service doesn&#8217;t need to run all the time on most systems, it&#8217;s often classified as <a href=\"\/blog\/windows-services\/startup-types-explained\/#manual-trigger-start\">Manual (Trigger start)<\/a>. In that case, it only wakes up to run if:<\/p>\n<ol style=\"margin-bottom:24px\">\n<li>\n<p>a program or another service asks it to start, or<\/p>\n<\/li>\n<li>\n<p>whenever a one or more Windows &#8220;trigger&#8221; events occur.<\/p>\n<\/li>\n<\/ol>\n<p>Indeed, if you examine the trigger events with our free <a href=\"\/products\/ServiceTriggerEditor\/\">Service Trigger Editor<\/a> utility, you will see that Windows will launch the service whenever &#8220;the computer joins a domain&#8221;:<\/p>\n<div align=\"center\"><a href=\"\/blog\/images\/windows-time-service-triggers.png\" class=\"zoomPopup\" title=\"Windows Time Service Triggers\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"image-padding\" src=\"\/blog\/images\/windows-time-service-triggers.png\" title=\"Windows Time Service Triggers (click to enlarge)\" alt=\"Windows Time Service Triggers\" border=\"0\" width=\"520\" \/><\/a><\/div>\n<p>That makes sense. When your PC joins a network, Windows Time jumps into action and synchronizes your clock if you&#8217;re connected to Active Directory. Afterwards, it stops and waits for the next network-join event or request to start. It&#8217;s a much more efficient way to operate versus starting at boot and running 24\/7.<\/p>\n<hr class=\"blog-section\">\n<p><a name=\"stop-windows-time-service\"><\/a><\/p>\n<h2 class=\"blog-caption\">What happens if I stop W32Time?<\/h2>\n<p>If you&#8217;re working in a home environment or without Active Directory, not much will happen if you stop the Windows Time service. In fact, most of the time you will find that the service is idle on your computer.<\/p>\n<p>And even if you&#8217;re in a corporate environment with networked PC&#8217;s, temporarily stopping W32Time should be fine. If it&#8217;s needed by a program or another service, they will simply start W32Time.<\/p>\n<hr class=\"blog-section\">\n<p><a name=\"ok-to-disable-w32time\"><\/a><\/p>\n<h2 class=\"blog-caption\">Is it OK to disable the Windows Time service?<\/h2>\n<p>It&#8217;s fine to disable the Windows Time service if your computer isn&#8217;t joined to Active Directory. But don&#8217;t expect a huge, CPU-saving impact because the service doesn&#8217;t spend much time running in that situation anyway.<\/p>\n<p>However, if your computer is joined to Active Directory, you should keep the service active. You don&#8217;t want to have any trouble signing in to your PC!<\/p>\n<p>In any case, if you insist on disabling the service you can do so the conventional way &mdash; by setting the <b>Startup type<\/b> to <b>Disabled<\/b> in the <a href=\"\/blog\/windows-services\/essential-tools-windows-services-msc\/\">Services app<\/a>:<\/p>\n<div align=\"center\"><a href=\"\/blog\/images\/disable-windows-time-service.png\" class=\"zoomPopup\" title=\"Disable the Windows Time Service\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"image-padding\" src=\"\/blog\/images\/disable-windows-time-service.png\" title=\"Disable the Windows Time Service (click to enlarge)\" alt=\"Disable the Windows Time Service\" border=\"0\" \/><\/a><\/div>\n<p>After you make that change, no person or program will be able to start W32Time. It will be inert.<\/p>\n<p>But if that&#8217;s not good enough and you really want to get rid of the service, you should run <a href=\"https:\/\/learn.microsoft.com\/en-us\/windows-server\/networking\/windows-time-service\/windows-time-service-tools-and-settings?tabs=config#command-line-parameters-for-w32time\" target=\"_blank\">W32tm \/unregister<\/a> from an <a href=\"\/WindowsServices\/FAQ.html#ElevatedPrompt\">elevated command prompt<\/a>. That command will stop the service (if necessary) and uninstall it from the list of services. Afterwards, Windows Time will be completely gone from your system.<\/p>\n<p>Don&#8217;t worry; if you change your mind and the Windows Time service becomes your friend again, simply run <a href=\"https:\/\/learn.microsoft.com\/en-us\/windows-server\/networking\/windows-time-service\/windows-time-service-tools-and-settings?tabs=config#command-line-parameters-for-w32time\" target=\"_blank\">W32tm \/register<\/a> to restore the service. You&#8217;ll be good to go.<\/p>\n<hr class=\"blog-section\">\n<p><a name=\"windows-time-service-questions\"><\/a><\/p>\n<h2 class=\"blog-caption\">Questions? Problems?<\/h2>\n<p>If you would like to know more about the Windows Time service, or you have a specific problem, please feel free to <a href=\"\/support\/\">get in touch<\/a>. We&#8217;ll do our best to help you!<\/p>\n<div style=\"margin-top:30px\" align=\"center\">\n<div class=\"cta-button-1\">\n<table role=\"presentation\" cellspacing=\"0\" cellpadding=\"0\" border=\"0\" align=\"left\">\n<tbody>\n<tr>\n<td align=\"center\"><a href=\"\/blog\/tag\/essential-windows-services\/\" title=\"Find more important Windows Services\"><span><nobr>More Essential Windows Services&#8230;<\/nobr><\/span><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<!-- relpost-thumb-wrapper --><div class=\"relpost-thumb-wrapper\"><!-- filter-class --><div class=\"relpost-thumb-container\"><style>.relpost-block-single-image, .relpost-post-image { margin-bottom: 10px; }<\/style><h3>You may also like...<\/h3><div style=\"clear: both\"><\/div><div style=\"clear: both\"><\/div><!-- relpost-block-container --><div class=\"relpost-block-container relpost-block-column-layout\" style=\"--relposth-columns: 3;--relposth-columns_t: 2; --relposth-columns_m: 2\"><a href=\"https:\/\/www.coretechnologies.com\/blog\/alwaysup\/grant-service-start-stop-rights\/\"class=\"relpost-block-single\" ><div class=\"relpost-custom-block-single\"><img decoding=\"async\" loading=\"lazy\" class=\"relpost-block-single-image\" alt=\"Q&amp;A: How do I allow Non-Admins to Start\/Stop\/Restart my AlwaysUp Windows Services?\"  src=\"https:\/\/www.coretechnologies.com\/blog\/wp-content\/uploads\/service-security-150x150.png\" style=\"aspect-ratio:1\/1\" style=\"aspect-ratio:1\/1\"><\/img><div class=\"relpost-block-single-text\"  style=\"height: 75px;font-family: Arial;  font-size: 12px;  color: #333333;\"><h2 class=\"relpost_card_title\">Q&amp;A: How do I allow Non-Admins to Start\/Stop\/Restart my AlwaysUp Windows Services?<\/h2><\/div><\/div><\/a><a href=\"https:\/\/www.coretechnologies.com\/blog\/alwaysup\/cae-visio-windows-service\/\"class=\"relpost-block-single\" ><div class=\"relpost-custom-block-single\"><img decoding=\"async\" loading=\"lazy\" class=\"relpost-block-single-image\" alt=\"Q &amp; A: Can my CAE\/Visio Application Run Properly as a Windows Service?\"  src=\"https:\/\/www.coretechnologies.com\/blog\/wp-content\/uploads\/qa-150x150.png\" style=\"aspect-ratio:1\/1\" style=\"aspect-ratio:1\/1\"><\/img><div class=\"relpost-block-single-text\"  style=\"height: 75px;font-family: Arial;  font-size: 12px;  color: #333333;\"><h2 class=\"relpost_card_title\">Q &amp; A: Can my CAE\/Visio Application Run Properly as a Windows Service?<\/h2><\/div><\/div><\/a><a href=\"https:\/\/www.coretechnologies.com\/blog\/servicetray\/version-5-1-released\/\"class=\"relpost-block-single\" ><div class=\"relpost-custom-block-single\"><img decoding=\"async\" loading=\"lazy\" class=\"relpost-block-single-image\" alt=\"ServiceTray 5.1: Improvements to Help you Control any Windows Service from a Taskbar Icon\"  src=\"https:\/\/www.coretechnologies.com\/blog\/wp-content\/uploads\/new-release-2-150x150-1.webp\" style=\"aspect-ratio:1\/1\" style=\"aspect-ratio:1\/1\"><\/img><div class=\"relpost-block-single-text\"  style=\"height: 75px;font-family: Arial;  font-size: 12px;  color: #333333;\"><h2 class=\"relpost_card_title\">ServiceTray 5.1: Improvements to Help you Control any Windows Service from a Taskbar Icon<\/h2><\/div><\/div><\/a><\/div><!-- close relpost-block-container --><div style=\"clear: both\"><\/div><\/div><!-- close filter class --><\/div><!-- close relpost-thumb-wrapper -->","protected":false},"excerpt":{"rendered":"<p>In this article&#8230; What is the Windows Time (W32Time) service? What happens if I stop W32Time? Is it OK to disable the Windows Time service? Questions? Problems? What is the Windows Time (W32Time) service? The Windows Time service (W32Time) implements &hellip; <a href=\"https:\/\/www.coretechnologies.com\/blog\/windows-services\/w32time\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":12947,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[352,78,376,196,293],"class_list":["post-12664","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-windows-services","tag-active-directory","tag-essential-windows-services","tag-w32time-service","tag-windows-services-2","tag-windows-time-service"],"_links":{"self":[{"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/posts\/12664","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/comments?post=12664"}],"version-history":[{"count":14,"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/posts\/12664\/revisions"}],"predecessor-version":[{"id":12959,"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/posts\/12664\/revisions\/12959"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/media\/12947"}],"wp:attachment":[{"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/media?parent=12664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/categories?post=12664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.coretechnologies.com\/blog\/wp-json\/wp\/v2\/tags?post=12664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}