Monthly Archives: May 2014

DelinvFile – Delete Invalid Files and Folders

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Windows allows the creation of file names and folder names that can not be deleted or renamed via Windows Explorer.  This includes names with invalid characters and names that are too long. The current limit is 260 characters.  In other words, windows can create names that are too long for the standard Windows Explorer to delete. When copying or deleting file the message: “Path too long” appears.

 

“DelinvFile.exe” is a Windows program that provides a convenient User Interface for selecting the file that you need to delete and provides for a choice of two delete methods. You use the standard controls for Drives, Folders, and Files to navigate to the Folder and Select the file to be deleted.

 

A trial version is available. See http://www.purgeie.com/delinv/

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The Windows Server Update Services console crashes when browsing for updates

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The Windows Server Update Services (WSUS) console crashes when browsing for updates and displays the following error message:

error

An unexpected error occurred. 
click reset server node to try to connect to the server again

 

This can occur if the application cache is corrupted.

To resolve this issue, delete the WSUS application cache from the location below:

C:\Documents and Settings\<user profile>\application data\microsoft\mmc

where user profile is the currently logged in user profile.

 

source: http://support.microsoft.com/kb/2761925

Default x.509 Certificates Have Longer Key Length

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Openening a java application fails with the following error (Failed to validate certificate):

 

Untitled

 

 

Starting from 7u40, the use of x.509 certificates with RSA keys less than 1024 bits in length is restricted. This restriction is applied via the Java Security property, jdk.certpath.disabledAlgorithms. The default value of jdk.certpath.disabledAlgorithms is now as follows:

jdk.certpath.disabledAlgorithms=MD2, RSA keySize < 1024

In order to avoid the compatibility issue, users who use X.509 certificates with RSA keys less than 1024 bits, are recommended to update their certificates with stronger keys. As a workaround, at their own risk, users can adjust the key size to permit smaller key sizes through the security property jdk.certpath.disabledAlgorithms.

 

Open the java.security file which is located in your client machine’s Java/JRE installed directory (e.g. C:\Program Files (x86)\Java\jre7\lib\security)

Look for this line:

jdk.certpath.disabledAlgorithms=MD2, RSA keySize < 1024

Change 1024 to 256 and save.

Now you can open the java application.

 

It looks like every java updates reset this parameter to 1024 so you need to change it to 256 each time you have upgraded java.