# Mp3Tag rebuilds library on every open, even when "Enable Library" is checked

**URL:** https://community.mp3tag.de/t/mp3tag-rebuilds-library-on-every-open-even-when-enable-library-is-checked/71319
**Category:** Support
**Created:** [May 21, 2026, 9:49am UTC](https://community.mp3tag.de/t/mp3tag-rebuilds-library-on-every-open-even-when-enable-library-is-checked/71319 "2026-05-21T09:49:55Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![yorickausyps](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/y/f6c823/32.png) [@yorickausyps](https://community.mp3tag.de/u/yorickausyps)
#### Post date: [May 21, 2026, 12:04pm UTC](https://community.mp3tag.de/t/mp3tag-rebuilds-library-on-every-open-even-when-enable-library-is-checked/71319/4 "2026-05-21T12:04:50Z")

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> [@VulgarAscetic](#):
>
> every time I launch Mp3Tag it goes through the process of building the library/database, which takes a huge amount of time.

Have you checked if your antivirus software e.g. windows defender blocks the mp3tag app or checks every time all your files? In this thread [Windows Defender - Speed of loading files in MP3Tag](https://community.mp3tag.de/t/windows-defender-speed-of-loading-files-in-mp3tag/47784) you can find more help about this.

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