uninstalling any software leaves roots in the registry...

Hello Experts,
I have noticed that any software when uninstalled leaces traces of its existence behind in the register as keys and values....

Why are not all of these erased with the uninstall process ?
Is it posible that they use these roots to know if the software was previously installed and many other things?

How can I get rid of those without going one by one?

And finally I found some legacy keys that simpy cannot be erased...
Please you support explaining these...
Best regards,
RGuillermoProject ManagerAsked:
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JohnConnect With a Mentor Business Consultant (Owner)Commented:
Some software is better than others at uninstalling, and some software imagines you will reinstall and so keeps the necessary information.

Over a long period of time (years on one build), it does not cause any problems.

.... Thinkpads_User
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aadihCommented:
Use Revo Uninstaller to uninstall (use advanced scan option).
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magarityConnect With a Mentor Commented:
CCleaner works great to remove unwanted registry values if it is already uninstalled: http://www.piriform.com/ccleaner

Yes, they do leave those values in there to keep you from reinstalling trialware over and over.  Please do not use CCleaner or Revo Uninstaller to steal trialware.
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RGuillermoProject ManagerAuthor Commented:
my job has to do with security among other functions.. is it posible that one of these left behing keys and data may be used to call a program on the internet or install an unauthorized program?

can any software developer store in the registry some info like credit card data or other sensitive data that can be used after uninstalling their software... I am thinking they can also leave another module silently maybe when installing and stays after uninstalling..
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JohnConnect With a Mentor Business Consultant (Owner)Commented:
A registry cleaner works after the fact.  Reputable software vendors do NOT do what you suggest.

If you download less reputable software and (perhaps) they leave silent modules, they likely would not fall victim to a registry cleaner.

.... Thinkpads_User
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magarityConnect With a Mentor Commented:
Your follow up questions are not really specific to the registry which is just a place to store values by the system. You could ask the same question about hidden system files or unallocated disk clusters. This is the sort of thing your antivirus software should be taking care of for your system in general because there is nothing automatically devious about leftover registry entries. If you're concerned about the effectiveness of your antivirus software, you should contact their support and ask about their data theft prevention capabilities. Meanwhile the two products already mentioned will clean up leftovers.
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nobusCommented:
>>  Reputable software vendors do NOT do what you suggest  <<   i have not yet found any program, that removes all traces after an uninstall - but that's my opinion.
i also use Revo; and after the unstall was done, you can remove keys with Regseeker:   http://www.hoverdesk.net/freeware.htm
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jcimarronCommented:
rguillermo--I also use Revouninstaller.

However, even assuming there is some malicious bits to a software program, remember that you are no worse off after having uninstalled the program compared to the situation before uninstallation.
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nobusCommented:
and even after revo - there are often traces left
i always wonder why they don't make a better install/uninstall system
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LeeTutorretiredCommented:
I've requested that this question be deleted for the following reason:

Not enough information to confirm an answer.
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JohnBusiness Consultant (Owner)Commented:
You cannot remove all traces of software and that was stated accurately:

My post http://#a39727934   

And the post by nobus  http://#a39728621

These are both good answers to the question.

.... Thinkpads_User
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nobusCommented:
and guillermo is leaving all his questions unattended
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RGuillermoProject ManagerAuthor Commented:
Thanks to you all... very helpfull information,....
sorry for the delay had an unprogrammed work trip..
Best Regards!!
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JohnBusiness Consultant (Owner)Commented:
@rguillermo - Thank you for following up.

.... Thinkpads_User
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