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The folder (C:\Windows\Installer) on my Windows 7 installation holds 1GB of installers are these necessary or can these be deleted ? If so are there any other places where Windows 7 saves the installers which are used to install files and can they be removed ?

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Is 1GB really worth it these days? I mean, one can buy a 2TB drive for very reasonable prices, and 1tb drives are almost given away in cereal boxes. –  Phoshi Dec 31 '09 at 16:09
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well it does matter if my C drive is collecting clutter unnecessarily I just needed to know if those were necessary files or not –  rzlines Dec 31 '09 at 18:48
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1 GB really is a lot when it's actually 9 GB (as it is on my machine), and your boot volume is an SSD with only 112 GB capacity... –  Slaggg Mar 3 '12 at 20:09
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marked as duplicate by Breakthrough, Brad Patton, Tog, Hennes, 8088 May 10 '13 at 3:13

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2 Answers

up vote 6 down vote accepted

Don't delete this folder or its content.

Use the Windows Installer CleanUp Utility instead as it will properly unregister files.

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Stay clear of that tool if you really don't need it, see superuser.com/questions/173981/… why... –  Tom Wijsman Aug 18 '10 at 11:15
    
This utility doesn't work for Windows 7. I am unable to find the latest version that works for Windows 7. I've tried 2 downloaded versions already. –  MacGyver Feb 6 '12 at 18:02
    
@Mr.MacGyver: Did you run it as administrator? Because it works for me, even on Windows 8... –  Tom Wijsman Feb 6 '12 at 18:13
    
probably not.. I'll try that. –  MacGyver Feb 6 '12 at 18:20
    
I also found this won't work for Windows 7, and I can't find any way to address this for Windows 7. I have that folder taking up 9 GB of my 112 GB SSD boot volume - vexing. –  Slaggg Mar 3 '12 at 20:05
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You can safely compress C:\Windows\Installer if you want to.

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if you do, will the uninstall or repair options still work in Programs and Features in Windows 7? –  MacGyver Feb 6 '12 at 18:03
    
@Mr.MacGyver: Yes, they will. –  Tom Wijsman Mar 3 '12 at 20:10
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