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Does Installing Many Programs Destabilize My Computer?

I try to limit the number of programs I install on my system. I do this because I feel intuitively that the more programs I install, the more quickly Windows reaches that corrupted state that we all know too well, and has to be reinstalled from scratch. I really could make good use of quite a number of programs I don’t have installed, but I worry about hastening corruption. I do assume that I can load as many portable applications as I like without worry. Am I on the right track? Or is my thinking just incorrect?

In theory, installing lots of different programs shouldn’t destabilize the system, regardless of how they’re installed.

Reality, on the other hand, says otherwise.

The real answer is, it depends more on the specific software you install then how you install it.

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Software rot

What you’re talking about has a name: “software rot.”

Dripping Digits The problem is that today’s systems and software are incredibly complex. That means installing software — even if it’s just the first run of a portable application (the kind which requires no setup program) — is also complex.

And subsequent updates and uninstalls add to the complexity.

As a result, it’s easy for settings — both the settings you see and the thousands of internal settings used only by the applications and Windows — to get confused. Depending on the software you’re running, that confusion can result in nothing at all, or it can cause the software, or even Windows, to misbehave.


The most common culprit is installing and uninstalling software you just want to try out.

It’s important to evaluate software to see if meets your needs. To do so, you’ll typically install it and run it. If you decide it’s not what you need, uninstall.

If you do this often, it’s a bigger cause of system destabilization (or “software rot”) than simply installing and keeping the software you use regularly up to date.

The good news is, things have improved in recent years. I frequently install and uninstall software, and rarely suffer for it. Don’t stop trying things out; your machine needs to meet your needs.

I have one recommendation, though.

Back up

Before you install something you’re just trying out, back up your system completely. Ideally, you’re already doing this by virtue of having a daily backup solution in place.

That way, if something does go wrong with the trial or its uninstall, or it happens to include PUPs, malware, or worse, you can quickly, easily revert to a state prior to whatever happened.

And besides, things can always go wrong completely unrelated to software installations, trials, or software rot. Backups protect you from it all.

Portable apps

I do want to share a thought about portable apps.

A portable app is an app that requires no setup or installation process. You simply copy it to your machine and start using it. To “uninstall” it, you delete the files or folders you copied.

In theory.

The problem is, portable apps often install things or set things up the first time you run them. In a sense, there’s still a setup process; you just don’t see it.

In general, portable apps are designed not to do much in the way of setup, but there are no guarantees. That’s why I fall back to being more concerned about what software you’re installing, not how much of it.

Unfortunately, it’s nearly impossible to determine how an application will behave prior to installing it. But if your portable, no-install-needed app suddenly includes a link or instructions to uninstall, chances are it has done something in the way of installation.

My recommendation

Within reason, install and evaluate what you need and use. Use your computer the way you need to. Don’t spend a lot of time worrying about software rot — expend that energy on staying safe instead. That’s probably a larger risk these days.

Just make sure to back up along the way. That’ll protect you from much more than software rot.

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Posted: January 22, 2020 in: Windows Programs
This is an update to an article originally posted April 20, 2013
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9 comments on “Does Installing Many Programs Destabilize My Computer?”

  1. I’ve noticed the software rot problem to be significantly improved in Windows 7 (and possibly Vista) and beyond, than with previous versions of Windows. It seems to have a self cleaning oven. This may be anecdotal and not really the case. Does anybody else out there have similar experience?

    That’s been my experience as well. I don’t think it self-cleans, but is simply more tolerant of dirt.

  2. is a great site for ‘portable apps’ (god, I hate the word ‘apps’, it just sounds weird) and it’ll tell you if it writes to anywhere besides the application folder.

    I like to use RegShot, which takes a snapshot of the registry and then compare it with another. I just like to know what’s going on with my computer.

  3. I fully concur that Windows 7 reduces, if not eliminates, software rot. It is by far the most stable operating system I have ever used, and I go back a few years when I say that – all the way to 1965.
    My Windows 7 has remained very stable ever since I stopped using so called registry cleaner programs. (At one time I had to reinstall Windows due to the mayhem caused by a registry cleaner!) I recommend you don’t use them and you will be a happy user it you don’t.

  4. If you install a lot of programs under Windows 7, even if you deinstall them later, your windows\winsxs directory will grow uncontrollably. AFAIK there is no solution other than a clean reinstall (or restore of an early backup).

  5. Regarding Leo’s suggestion to forget Apps, I would like to know if add-ons are the same as apps. I have three add-ons to my Firefox browser, and I feel they are a big help. I also have used a Kindle app via my Firefox, and this enables me to read Kindle books for free without even putting an actual Kindle program onto my computer desktop. Would these still be enough of a safety problem to get rid of them? I’ll do whatever you say, Leo.

  6. I was wondering what exactly it is about the installing then removing of programs that causes the problems…and if you use a thorough uninstaller such as Revo, would that make any difference?

  7. @Natalie
    The Apps Leo is talking about are Portable Apps. He’s not saying anything against them. They are perfectly fine to use. What he’s saying is that it’s just as safe to use the installed version as the portable version of these programs. “Portable apps are great, but they don’t necessarily offer a significant increase in system stability by avoiding the setup process.” He’s simply saying that you can skip the apps and be just as safe.

  8. @Bonita
    The problem is that many freeware and some shareware programs don’t necessarily uninstall completely. A well designed program should uninstall with no harmful traces.

  9. I slightly disagree with Leo.

    Installing software can sometimes also cause problems. Not rot, but it seems that so many programs these days like to put themselves into StartUp or the Run registry key so that they run when you boot up your computer.

    They say they are doing you a favour by pre-loading some components of the software so that it runs faster when you go to use the software. But the reality is, sometimes you are just turning on your computer to check your email and don’t need five different programs to take the time to load up into memory or check for program updates (e.g. Flash) and slow down your computer.

    I recently started from scratch on my Windows XP computer and I took the time to evaluate how I used that computer (I also have a laptop that I use regularly) and look at what software I was putting back on the machine. If another piece of software duplicated a task, I only installed one. I only use Excel on my laptop, so I didn’t bother to install Excel on the XP computer, for example.

    What I ended up with was a cleaner machine that is quicker to boot up so I can do what I really turned the computer on for, not what some software vendor thinks I might want to do.

    Actually you raise a very good point with respect to start-up pollution.



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