Technology in terms you understand. Sign up for the Confident Computing newsletter for weekly solutions to make your life easier. Click here and get The Ask Leo! Guide to Staying Safe on the Internet — FREE Edition as my thank you for subscribing!

Can I Delete Setup Files I’ve Downloaded?

Can you safely delete set-up files of programs or updates that you have downloaded from the internet? My C: drive’s Windows’ Downloads folder has files as far back as five years. Since these were set-up or update files, I assume they were zipped, and that upon installation, the electronic carapace for lack of a better word became discardable? Is this correct, or is the downloaded file necessary to the proper functioning of the file or update that has been downloaded (like a Jack-in-the-Box, that would stop being a Jack-in-the-Box if you removed the box)? Which types of downloaded set-up files or updates are safe to delete, and which MUST remain (if any MUST remain)?

The answer is both yes and no.

Assuming you’ve run the set up to install the programs they contained then yes, you can delete setup files safely. The programs will continue to work without them.

However, the answer is also no: you don’t want to delete them. You want to do something else instead, for reasons that aren’t always obvious.⋅

Become a Patron of Ask Leo! and go ad-free!

Downloaded setup files are like installation media

In a very real sense, set-up files and packages that you download from the internet are almost exactly like the original installation media you might have received when you purchased software in some physical form.

It used to be almost all software was sold or packaged and distributed on CD or DVD media (or floppy disks, if you go back in time far enough). On those discs were the set-up files for the program you’d purchased. You ran the set-up program, and the software was copied onto your computer. After set up was complete, you removed those discs and began using the new software on your machine.

While the distribution model is different – downloading a file rather than receiving a disc – the actual method hasn’t changed much at all. When you run the downloaded set-up program, it copies the software onto the appropriate locations onto your hard disk. After the set-up program is done, it’s no longer required for the installed software to run.

If it were on a disc, you would eject it.

Yes, you could just delete set-up files. But don’t. Not yet, anyway.

Download Saving downloads

You want to save that downloaded setup program before you delete it.

The issue is very simple: if you ever need to set up the program again, you’ll need the set-up program to do so.

When you have physical media – like an installation DVD – you can simply keep that somewhere and pull it out when needed. However, if you routinely delete set-up files before saving them somewhere, when it comes time to set up that program again, you might be out of luck.

The most common scenario for needing that download again is getting a new machine. You’ll probably want to install that software on your new computer.

The second most common scenario? Reinstalling an existing machine from scratch because of a bad malware infection, or because the hard drive died and you didn’t have a backup. The instructions for a complete reinstall are pretty simple: reinstall Windows, and then reinstall all your applications. If you don’t have the download, you might not be able to do that second step for some programs.

Download it again

The most common objection to needing to save downloads is simply that you can always download it again.

Always? I don’t think so.

Besides assuming you have an internet connection, there are several scenarios where that’s just not something you can count on:

  • Software that you purchase in download form can often only be downloaded for a limited time.
  • You may have need for the specific version of the software that you have installed – something you may not even realize until that version is no longer available for download.
  • The vendor can go out of business. (This happens more often than you think.)

The safest thing to do is to save or archive those downloaded programs somewhere.

What I do to delete setup files

I keep my Downloads folder clean. In fact, as I type this, it’s completely empty.

When I download software to my machine I:

  • run the set up to install the software
  • copy the download to a backup drive, replacing any previous copy for that same software
  • delete the download from the Downloads folder

That way, I always have a copy of the most recent set-up program for all the software I use.

In my case, since I have several computers, this practice also allows me to avoid downloading the same thing multiple times. Each of my networked computers can simply now run the set-up program from the copy I archived after the first download.

If you found this article helpful, I'm sure you'll also love Confident Computing! My weekly email newsletter is full of articles that help you solve problems, stay safe, and give you more confidence with technology. Subscribe now and I'll see you there soon,


Podcast audio


31 comments on “Can I Delete Setup Files I’ve Downloaded?”

  1. the person said they have files that go back as far as 5 years. wouldn`t those downloads be out of date? to say the least. but it sounds like this person is in need of a clean re-install. wasn`t it you Leo who we should do a clean re-install at least twice a year? if they`re trying to speed up their computer that`d be the first place i`d look. 5 years! imagine the clutter.

    • I have some OLD downloads that are 10 to 15 years old, some of those are bough softwares, from now out of business vendors, that I still use regularly.
      Normaly, most peoples don’t need to perform any clean reinstall of the OS for the entire time they own a given computer. Doing it twice, or more, a year is only for peoples that are doing researches, testing and other things that may corrupt the OS or worst or that demand a clean slate state. Leo NEVER recommended doing any clean reinstall at that frequency. He just said that he, given his very special use of his computer, regularly did clean reinstalls.

    • Not twice a year, no, but periodically is indeed a good idea. Two years is what I’ve been doing, but of course it depends on how you use your computer. Setup files won’t be impacting speed however – they’re just benignly taking up space.

      • When I setup my computers, I create a separate folder : “C:\DOWNLOADS”.
        I set my browser (Firefox) to automatically ask me to save files to this folder;
        upon download of a file I create a separate folder for the company that i get the file from such as Adobe, Dell, HP etc
        save the file in the in this folder (C:\DOWNLOADS\ADOBE\) so I can keep them somewhat organized; I can also copy the entire \DOWNLOADS folder
        to backup location, overwriting any previous files.
        As of this writing my current C:\DOWNLOADS folder is 15GB and growing.
        I also keep the default “My Downloads” folder empty.
        This may give someone a way to keep up with these setup/update files.

  2. You have great articles, and I read them often.
    Could you please make them less wordy. I have to read and read to get the answer.
    Could you just say mostly yes or no and then briefly delineate.

    Thanks You

    • Unfortunately answers are rarely just yes or no, and require explanation so that individuals can take the actions most appropriate to their situation.

      • I get that some one may like a short and sweet answer; but the reality is, I am sure there are many of us who appreciate the explanations. I know I appreciate the little extra why’s, do’s and dont’s to your answers. It helps fill in the blanks for what is or may be happening.

        Now, What about windows set up files. Are there parts of windows that can be archived the same way? Are there other setup files on a machine that might be archived as well. Keeping a machine organized seems really overwhelming sometimes.

        I remember my first computer loading dos up and then loading the program you would use, one at a time… No windows to switch programs with, at least not until Atari came out with a better unit and hard drives…

        • I guess what the original poster is asking for is a tl;tr (geek speak for Too Long To Read) – a short summary.
          A request that’s not quite unreasonable, allthough we of course all do enjoy Leo’s brilliant explanations! In this case the bottom line would be β€žYes, you can delete setup files, but you need to back them up first.β€œ

  3. Leo, Thanks for answering this question, particularly because I was who asked it. I have never read you say prophylactic re-installs are necessary, and your response “learned me” something I *sincerely* didn’t know–to save set-up files for re-use. My Secunia score isn’t what it once was (the anti-hacking watchdog software that alerts you specifically about security patches necessary for primarily third-party software, a watchdog software the New York Times pushed very strongly in 2013). However, I assume that malware programs like Malwarebytes would, if old set-up files were installed, be there to kick *ss. In fact, Leo, on the fifth birthday of my workhorse Studio, I owe you the biggest thanks of all that my favorite electronic child is still thriving. New screen, new keyboard, new everything–but because of Ask Leo, Little Studio got all his electronic “inoculations” and is a happy healthy Core 2 Duo πŸ™‚

  4. I am a walking, talking recent example of why those install files are so precious. AND I would impress upon you the value of the keeping the patches/updates around, too. And keep a log somewhere of your serial / license numbers because sometimes you need those to apply the patches.

    A few weeks ago I had to scrub my system because of the @#$&%^$ poweliks virus. Among my reinstalls were Quicken 99 and Acrobat Pro 8. Both products are deprecated and no longer supported. Though the updates are “out there,” they are incredibly difficult to find. The vendors, after all, have a vested interest in getting us to abandon our oldies but goodies.

    Everything is now back in working order. Because I had my old exe files.

  5. Is it not the case that sometimes the installation files are also the uninstall files? I find it a real pain getting a “not found” message when I wan’t to get rid of an old prog.

    • This is true. It’s rarely the actual file you downloaded, though. More often the setup process will install an uninstall program of some sort, or copy what needs to be saved to the install folder.

  6. I actually deleted the setup files of a software and now the software is not working and i need the setup to reinstall. Is there any solution to my problem except downloading the whole thing again as it was pretty huge.PLEASE HELP

  7. I zipped all files that were downloaded by Canon when installing a printer. Can I now delete the original win-mg2900-1_1-ucd file? It is huge! The last time I deleted this file I had to reinstall the printer, thus creating all these duplicate files. I am not sure what is safe to remove.

    • As long as you have the ability to download them again when you need them, there shouldn’t be any problem deleting them.

  8. I’ am playing batman arkham game in pc, but it is was again and again crashing so i deleted the game, but i had the setup files which i downloaded from net……..and i also saved the data of the saved games, but when i want to reinstall game the game isint installing again………….what to do?

  9. Hi Leo , i always used to receive your newsletter and i think it was lost when a friend built the pc i am on now. i went to subscribe to your newsletter again which has a free download of your ebook on how to browse safely on your computer. It said email address blocked. Refer to ? what do i refer to ? When you have time to look at this i would like to subscribe again. Thank You , Don Barajas…..

    • Not sure why that would be, but it’s generally something my email list provider does on in cases of abuse or attempted spam. All I can suggest is subscribing using a different email address. Sorry.

  10. I DL installer programs to my DeskTop, and I install from there, BUT I then almost ALWAYS paste a copy of that installer program (usually slightly renamed at DL) to its installation directory (I need Administrator credentials to do this, but I don’t mind), along with any associated license files or such.

    It’s the logical place to put it, and means I never need to go “looking” for it (!); this practice has saved my tush on many an occasion! :). :). πŸ™‚

  11. Hi Leo, I was pleased to read your suggestion to save set-up files etc. in a separate folder for when “disaster strikes” as you said. Your suggestion pleased me because it’s what I’ve been doing and you have confirmed that I should keep on doing it. Thanks! However, I’ve been MOVING set-up files and other downloaded junk onto a flash drive, instead of COPYING to a backup drive and then DELETING the set-ups from the Downloads Folder, as you suggested. Leo, was my choice to MOVE them to a flash drive a mistake? I haven’t ever needed them (yet) and all the related programs work fine … but, am I in for a bad surprise if I should ever need to move them back into the computer? Cheers and Happy New Year.

    • USB flash drive have a limited amount of writes before they start to fail. There’s no harm in saving them to a flash drive as long as you have backup copies. My personal opinion of USB flash drives is that they are great for copying data from one computer to one computer or device to another. I don’t trust them for anything more permanent.


Leave a reply:

Before commenting please:

  • Read the article.
  • Comment on the article.
  • No personal information.
  • No spam.

Comments violating those rules will be removed. Comments that don't add value will be removed, including off-topic or content-free comments, or comments that look even a little bit like spam. All comments containing links and certain keywords will be moderated before publication.

I want comments to be valuable for everyone, including those who come later and take the time to read.