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What are these files, can I safely remove them?

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#1 EmaWW


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Posted 27 April 2010 - 07:34 PM

I've tried to find and clean leftover & invalid files on my PC (WindowsXPpro) . Run Free Uninstaller and other uninstalling programs the result is display of files marked as Invalid .
Some examples below:
{71d6ce84-b7dc-4166-8e0d-56c1c37bfb5a} used rarely(0) icon file,0 uninstall string Dummy

In info it is described as HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{71d6ce84-b7dc-4166-8e0d-56c1c37bfb5a} ----------------------------------------
{E85FA9A1-C241-4698-893B-DD99509B8DB0} used rarely(0) icon file ,0

In info it is described as

{B12665F4-4E93-4AB4-B7FC-37053B524629} 15.70 MB used rarely (2)

In info it is described 2 times as:
and also as :

The questions:

1. What exactly are these files and can I delete them safely?
2. Is there any method to identify when files marked as invalid are safe to delete?

Thanks in advance for any simple advise!

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#2 hamluis



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Posted 27 April 2010 - 07:42 PM

<<What exactly are these files and can I delete them safely?>>

The items you list are registry entries. Registry entries are created for files when installed. I don't believe in searching the registry for files to delete, so I can't tell you if you can delete them safely. I would leave them alone if I didn't know for sure that they were not useful/essential.

You can Google each item...to find out what program is associated with it.


#3 EmaWW

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Posted 02 May 2010 - 11:05 PM

Yes but these files are marked as "Invalid".

Wht does it mean in plain English?

To my understanding if "Invalid" they are not to be kept in the computer.

Any other opinions about this, please?

#4 AMD010


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Posted 03 May 2010 - 12:49 AM

what utility told you that they where "invalid" I cannot imagine that you are browsing your computers registry and just deleting stuff lol. either way, my general rule of thumb, if it aint broke dont fix it. most registry "repair" programs do more harm than good. I occasionally use CCleaners registry cleanup tool, of course after backing up the registry.
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#5 keyboardNinja


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Posted 03 May 2010 - 12:52 AM

Bleeping Computer DOES NOT recommend the use of registry cleaners/optimizers for several reasons:

• Registry cleaners are extremely powerful applications that can damage the registry by using aggressive cleaning routines and cause your computer to become unbootable.

The Windows registry is a central repository (database) for storing configuration data, user settings and machine-dependent settings, and options for the operating system. It contains information and settings for all hardware, software, users, and preferences. Whenever a user makes changes to settings, file associations, system policies, or installed software, the changes are reflected and stored in this repository. The registry is a crucial component because it is where Windows "remembers" all this information, how it works together, how Windows boots the system and what files it uses when it does. The registry is also a vulnerable subsystem, in that relatively small changes done incorrectly can render the system inoperable. For a more detailed explanation, read Understanding The Registry.

• Not all registry cleaners are created equal. There are a number of them available but they do not all work entirely the same way. Each vendor uses different criteria as to what constitutes a "bad entry". One cleaner may find entries on your system that will not cause problems when removed, another may not find the same entries, and still another may want to remove entries required for a program to work.

• Not all registry cleaners create a backup of the registry before making changes. If the changes prevent the system from booting up, then there is no backup available to restore it in order to regain functionality. A backup of the registry is essential BEFORE making any changes to the registry.

• Improperly removing registry entries can hamper malware disinfection and make the removal process more difficult if your computer becomes infected. For example, removing malware related registry entries before the infection is properly identified can contribute to system instability and even make the malware undetectable to removal tools.

• The usefulness of cleaning the registry is highly overrated and can be dangerous. In most cases, using a cleaner to remove obsolete, invalid, and erroneous entries does not affect system performance but it can result in "unpredictable results".

Unless you have a particular problem that requires a registry edit to correct it, I would suggest you leave the registry alone. Using registry cleaning tools unnecessarily or incorrectly could lead to disastrous effects on your operating system such as preventing it from ever starting again. For routine use, the benefits to your computer are negligible while the potential risks are great.

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