# Windows installer: update bug

**URL:** <https://swi-prolog.discourse.group/t/windows-installer-update-bug/141>\
**Category:** Installing\
**Tags:** bug\
**Created:** [February 6, 2019, 10:02pm UTC](https://swi-prolog.discourse.group/t/windows-installer-update-bug/141 "2019-02-06T22:02:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![pmoura](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/pmoura/32/11_2.png) [@pmoura](https://swi-prolog.discourse.group/u/pmoura)\
**Post date:** [February 6, 2019, 10:02pm UTC](https://swi-prolog.discourse.group/t/windows-installer-update-bug/141/1 "2019-02-06T22:02:03Z")

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Hi,

Having SWI-Prolog 8.1.0 installed in my Windows 7 64 bits VM, I downloaded and run today the 8.1.1 installer. It wrongly complained that version 8.1.1 was already installed.

Cheers,  
Paulo