# \[HELP\] Windows Installer taking up 20+ GB of space

**URL:** <https://onehack.st/t/help-windows-installer-taking-up-20-gb-of-space/122524>\
**Category:** Discussion & Solutions\
**Tags:** solved\
**Created:** [October 1, 2020, 8:17pm UTC](https://onehack.st/t/help-windows-installer-taking-up-20-gb-of-space/122524 "2020-10-01T20:17:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![HaZel\_Merchant](https://onehack.st/user_avatar/onehack.st/hazel_merchant/32/78275_2.png) [@HaZel\_Merchant](https://onehack.st/u/HaZel_Merchant)\
**Post date:** [October 1, 2020, 8:17pm UTC](https://onehack.st/t/help-windows-installer-taking-up-20-gb-of-space/122524/1 "2020-10-01T20:17:40Z")

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I apologise in advance if this is an issue that has been covered, but I can’t seem to get a straight answer anywhere about what is the best way to handle my C: \> windows \> Installer folder which is hidden. I get to know about this using Treesize software. Obviously I’d like that room back if I can get it.  
Thanks community.

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**Author:** ![Margaret](https://onehack.st/user_avatar/onehack.st/margaret/32/174872_2.png) [@Margaret](https://onehack.st/u/Margaret)\
**Post date:** [October 1, 2020, 8:24pm UTC](https://onehack.st/t/help-windows-installer-taking-up-20-gb-of-space/122524/2 "2020-10-01T20:24:52Z")

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![](https://www.howtogeek.com/wp-content/uploads/2013/01/image56.png)

This should work!

[https://www.howtogeek.com/133264/how-to-use-ntfs-compression-and-when-you-might-want-to/](https://www.howtogeek.com/133264/how-to-use-ntfs-compression-and-when-you-might-want-to/)

![](https://filestore.community.support.microsoft.com/api/images/e4bf14aa-58ba-4b0b-8a6a-c88c4f7135fc)

- **[System and Reserved Files are taking too much space.](https://answers.microsoft.com/en-us/windows/forum/windows_10-performance/system-and-reserved-files-are-taking-too-much/e73bc888-fff5-409a-8d91-d55b6a3aa843)**