starts guessing<\/a> by doing textual matching between the name of the program in the Start menu and the name of the program in the Programs and Features<\/i> folder<\/i>. <\/p>\nAnd if a program does not provide installed-on information, then the Programs and Features<\/i> control panel assumes that the file was installed (or last modified) the last time its uninstall information was modified. There is no creation time<\/i> for registry keys; last-modified time<\/i> is all you get. <\/p>\n
The final piece of the puzzle is that in Windows 10, the Storage Service looks for programs that registered with the Programs and Features<\/i> control panel but didn’t provide any size information, and it works behind the scenes trying to do a better job of figuring out which files on the system are part of that program, and when it comes to a conclusion, it updates the registration with the updated size information. <\/p>\n
Okay, now it’s time to connect the dots. <\/p>\n
You install a program that provides incomplete information in its Programs and Features<\/i> registration. <\/p>\n
Some time later, the Storage Service figure out a good estimate for the size of the program. The Storage Service then updates the registry entry with the improved size stimate. <\/p>\n
Updating this information causes the Size<\/i> column to change. <\/p>\n
And if the program did not specify an Installed On<\/i> date, it also has as a side effect of changing the last-modified time<\/i> of the registry key, which causes the Installed On<\/i> column to change. <\/p>\n
To avoid this problem, just make sure your program fills out both the InstallDate<\/i> and the EstimatedSize<\/i> fields when it registers with the Programs and Features<\/i> control panel. <\/p>\n
Of course, if it’s not your program, then you either have to lobby the program authors to do it, or you can just dive in and set the values yourself. <\/p>\n","protected":false},"excerpt":{"rendered":"
Because the system is trying to fill in missing information.<\/p>\n","protected":false},"author":1069,"featured_media":111744,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[104],"class_list":["post-98805","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oldnewthing","tag-tipssupport"],"acf":[],"blog_post_summary":"
Because the system is trying to fill in missing information.<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/98805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/users\/1069"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/comments?post=98805"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/posts\/98805\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/media\/111744"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/media?parent=98805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/categories?post=98805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/oldnewthing\/wp-json\/wp\/v2\/tags?post=98805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}