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Unusedprograms also sit around unloved and unnoticed but taking up space. To uninstall an app from a Windows PC, click the Start button and look for the app or program. Press and hold (or right-click) the app and select Uninstall.

Cache and cookies on your web browser: The cache refers to the web pages your browser saves to improve browsing speed). Cookies are the data stored on your computer by websites you visit (no chocolate chips), and they build up as you surf. You could remove all this browsing data yourself from every browser you use regularly, but surely life is too short? The Avira junk cleaner helps wipe away leftover web traces for you.

Windows registry: This is a database of information, settings and options for software and hardware installed on Microsoft Windows machines. After years of software installs, uninstalls, and program upgrades, it can be littered with junk. Let the Avira PC cleaner analyze and help clean up your registry.

Avira can help declutter your mobile too. In addition to online security, Avira Antivirus for Android lets you optimize system usage, and the RAM cleaner frees up memory and shuts down unnecessary processes to help enhance performance. Avira Mobile Security for iOS offers a Smart Scan to alert you to performance issues, and the Photo Cleaner tracks down and deletes duplicate pictures to save space.

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As time goes by, a lot of junk files will appear on the computer, such as cache files, temporary system files, installer files, registry junk, and so on. There is no doubt that problems can arise when these junk files grow on the hard drive.

Since junk files can take up a lot of storage space, your PC may suddenly slow or experience other performance issues when your hard drive fills up. To avoid these problems, it is important to delete junk files regularly. To do it, we need a reliable PC junk cleaner in Windows 10 or 11.

After learning the importance of cleaning your PC, you might be wondering does Windows 10 have a PC cleaner? Yes, Windows 10 can use the built-in Disk Cleanup and Storage Sense to clean up junk files. Please refer to the following steps:

From the above, it can be seen that it is very necessary to clean up the disk regularly, because this can keep your device in good running condition. If you want to know how to clean all the junk from your PC, I sincerely recommend AOMEI Partition Assistant Standard to you.

Did you see it? If you are looking for a powerful PC junk cleaner for Windows 10 and 11, don't miss AOMEI Partition Assistant Standard. Besides cleaning PC, it can also format partition, merge partition, disk defrag, etc.

If you upgrade to Pro Version, there are more advanced features waiting for you to unlock, such as allocate free space from one drive to another, upgrade HDD to SSD without reinstalling, convert system disk from MBR to GPT, and so on.

Let's follow through that train of thought. If applications need per-user configuration but can't store it in the Registry, where can they store it? The choices are pretty much some kind of configuration under the user's profile (either Application Data or Local SettingsApplication Data depending on size and roaming requirements), or under the application's directory.

If you place the configuration data in the application's directory, it becomes difficult to back up - one of the main reasons for the Program Files/My Documents split way back in the Windows 9x days. It's also impossible to roam. It's pretty terrible for security too as you'd have to grant write permissions for the application directory to all potential users. This is already a major issue for auto-updating apps.

Placing the configuration files in the user's Application Data or Local SettingsApplication Data folder (CSIDL_APPDATA or CSIDL_LOCAL_APPDATA) has exactly the same problem when uninstalling - that only the current user's profile will be available. The default security descriptor in Windows XP for a user's profile is that only the user and the SYSTEM account can read or write these folders, so in fact the problem is worse than the registry.

In any case, any situation where you as a programmer allow third parties to alter your configuration allows them to make this kind of configuration issue. IE perhaps needed to be more robust in the face of this error. Perhaps Windows in general needs a way to allow the programmer to hook up a cleanup routine to run the next time a user with a profile on the system logs in - but at what point can the system be declared 'clean' and the cleanup routine finally removed?

10/2/2005 7:06:00 PM by Mike Dimmick

"Perhaps Windows in general needs a way to allow the programmer to hook up a cleanup routine to run the next time a user with a profile on the system logs in - but at what point can the system be declared 'clean' and the cleanup routine finally removed?"

More importantly, this way trojans and security flaws lie. This would require write access to someone elses registry (for example) in order to run software when they log in, to clear up their settings.

And if you can do that while uninstalling software, what's to stop malicious software from using the same loophole?

10/3/2005 11:16:00 AM by icabod

If the user is using roaming profiles, it is possible they still have the application installed on another PC so removing keys from HKCU might still be wrong. For example, you might have an application installed on your normal desktop, roam to another PC, install the application, uninstall it again when you have finished and expect your settings not to be lost on your main PC.

10/3/2005 12:44:00 PM by Anonymous

No news here. Anybody who had written more or less complicated installer should know about this issue.

What is amazing is that having forced everybody to use this humongous pile of crap which is Windows Installer, Microsoft didn't think this issue through.

This is a simple resource usage problem. A single resource (registry key, XML config file etc.) is being used by multpile entities and needs to be cleaned up when no longer in use. The answer is also known a long time and it is some form of garbage collection. For example in this case one could imagine built-in reference counting for registry keys. An installer will increment reference count while uninstaller decrement it. A system process will periodically scan the registry and clean up unreferenced keys. This would also take care of multiple installations on a roaming profile.

Of course if an application forgot to manage reference count the junk will still be there but at least good developers would have a way to write well behaved applications.

But of course such issues are not a priority these days. It is much more exciting to push some piece of .CRAP bloatware on developers than to take care of robustness and stability.

10/3/2005 1:43:00 PM by Anonymous

Obviously, we have another no-thought anti-MS poster!

Imagine we're talking about linux installers for a moment, the problems are exactly the same.

Root installs some software, and every user can use it. No doubt it'd store its per-user configuration in a config file in the user's home directory. So far, no problems - this is what happens already.

Now, 2 users log in and use the software. Again, no problem.

After a while, the admin decides to remove the software. Log in as root, uninstall the package... ok. What happens with the 2 user's config files? can the uninstaller go and delete them? will you trust the uninstaller to delete what it likes in every user's home dir? no? Then how do those files get deleted?

Its not a '.crap' 'bloatware' issue, but just the way the world is. No installer in the world can fix this issue without being a security issue.

10/4/2005 5:40:00 AM by andyB

IE shouldn't break if there's a simple user reference to a global entity which is not there anymore. This is a clear IE bug IMO.

This whole issue is OS and storage-flavour independent. Same issue is there in OS X, or whether you use .xml, .ini, registry, whatever. There's no real uninstall-time solution to remove per user leftovers. In OS X there's no install/uninstall for the majority of apps, it's just copy/delete.

Removing the leftovers is not always preferable anyway, since user can reinstall app later on and expect the settings to be there.

So, what apps can do is to handle user-settings/data with great care, and what the OS can do is to not slowdown/crash/misbehave if there are a few settings left there. Plus both of them should make it as easy as possible to identify, delete/move/save/restore these data. Fully file based setting/data storage has an advantage here, especially if there's a clear folder layout helped/enforced by the OS.

10/5/2005 7:11:00 AM by gar

I agree that the troubleshooting example highlights a bug in IE. I also agree that the problem is universal to all operating systems and I haven't thought of a clean solution. My intent was to bring the problem to the attention of people that might not have ever thought of it.

10/5/2005 9:19:00 AM by Mark Russinovich

The configuration data is just one part of application data and one part of data in general. I'd like to think about it in terms of "storages" having different scopes. When we are using some application we have (per-user or per-machine or per-installation ...) * (configuration or preferences or environment or application ...) data. The work document you are editing is also data. What to do with it when we uninstalling Word? There are shared documents and configurations as well. It is so complex; probably, I would rather like easy possibility to cleanup my house myself, instead of allowing everyone to come and take things from it. And all I need is a clear picture what is where. Does someone uses currently the blah-blah-Local Settings-Application Data-blah-blah-crap.xml?

It would be nice to have an intelegent garbage collector, though, which obviously must be a part of OS/file system.

An application must not even worry about how the data are stored, ini-file or registry or xml. It must be just an API for that. Unfortunately Registry API was not universal enough, it just added complexify instead of solve the problem completely.

10/5/2005 3:17:00 PM by Valery Tolkov

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