Cannot launch SQL Developer 4.2 - oracle-sqldeveloper

A Windows server A contains SQL Developer 4.2. When I double click on its exe file, nothing happens, not even a flash screen. When I try to run the exe from the command prompt, nothing happens too, not even an error message.
From server A, I mapped a drive from server B. So now server B's F:\ drive is now Y:\ in server A. Server B also has SQL Developer 4.2 in its F:. If I login to server B, I can launch SQL Developer 4.2 from its F:. But when in server A, I cannot launch SQL Developer 4.2 from the Y:\ drive.
In server A, if I open command window and enter "java -version", I get Java 1.7.
How do I get SQL Developer 4.2 to work in server A? It is frustrating when there is not even an error message. I have been googling for an answer, but so far nothing works.

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Oracle SQL Developer Cloud Wallet Mac computer error: Invalid configuration file

I am at a loss why I received the "Invalid configuration file" error on a Macintosh computer when connecting to an Oracle Cloud database using a Cloud Wallet file, see attached screenshot. Normally, the service box is populated automatically, but in this case it is empty. Therefore, the connection will not work.
Has anyone experienced this, or does anyone knows what is going on?
Thanks very much in advance.
I have found the issue on the Mac computer. It seems that in newer versions of Mac OS (not sure which ones) Safari automatically unzips a zip file. So this was the problem as SQL Developer needs to load the wallet file as a zip file and not unzipped.
There is an option in Safari to turn this off:
Open Safari.
Click Preferences.
Under the General tab, uncheck the option Open “safe” files after downloading.
I had a similar issue with sql developer version 20.4.0.379. It seemed to be caused by certain versions of the JDK. Mine didn't work with jdk1.8.0_281 but was fine with jdk1.8.0_171.
Try changing the version in the SQL Developer ~/.sqldeveloper/20.4.0/product.conf file.
e.g Add the following line (after installing an earlier version of JDK):
SetJavaHome /Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home

Oracle SQL Developer 4.2 windows authentication for SQL Server

I have SQL developer 4.2 and jtds-1.3.1. I am unable to connect to MS SQL Server
through Windows Authentication.
I have placed the "ntlmauth.dll" and "JtdsXA.dll" in jdk/jre/bin. it's not
working.
Placing file under jdk/bin is not working.
Placing file under Windows/System32 is not working.
I restarted the machine every time, while trying above 3 options.

Oracle SQL Developer 4.1.3 not loading in Windows 10

I've recently downloaded Oracle SQL Developer 4.1.3 from Oracle Website
and this with JDK as well, but I tried to run in windows 10, it only goes 10% of progress bar, then disappeared. Can't run it at all?
SQL Developer 4.1.3 can connect to Oracle 11g db, right?
I've found 2 things most likely cause what you're experiencing:
video driver conflict with windows and Java - this is usually what happens to cause the program to just 'disappear.' If you open a CMD window, CD to your sqldeveloper\bin directory, and run the exe from there, you should see some sort of Java 'crash' stack when the GUI goes away suddenly. And in there, you'll see a reference to a windows dll that belongs to the video driver. if that's the case, update that driver, and you should be good
the application settings for your OS user are corrupted. To fix, find your AppData, Roaming Profiles folder for 'SQL Developer' - there should be a system4.1.3... folder in there - rename it, and restart sql developer.

PowerShell 3.0 Installation Error on Windows 7 SP1

I have been trying for a couple days to get Windows Management Framework 3.0 to install on my Windows 7 Enterprise, SP1 desktop machine. The installation seems to go fine, and at the end it requests a reboot as it should. After the reboot, it says installation has failed and rolls everything back out.
In the System Setup Logs it shows the following error:
Package KB2506143 failed to be changed to the Installed state. Status: 0x80070005.
I definitely meet the pre-requisites. I have uninstalled .NET 4.5 and 4.0 and re-installed both, with reboots in between. It always comes back with that same error.
Any ideas?
Make sure you run the installation as Administrator. It's not sufficient to be logged on with an account that has local admin privileges; you need to select Run as administrator from the context menu, or run it from an elevated command prompt. I ran into that error the first time I tried to install Management Framework 3.0 by just double-clicking the downloaded .exe file. It worked when I launched it from an elevated prompt (Run as administrator would have the same effect).
For me the problem was the .Net Framework WoW64 features were missing. More specifically mscoree.dll couldn't be found. Installing the NetFx2-ServerCore-WoW64 & NetFx3-ServerCore-WoW64 features fixed the problem for me.
http://josheinstein.com/blog/2011/09/solved-this-program-cant-start-because-mscoree-dll-is-missing-from-your-computer/

Sql Server 2008 R2 Web setup throws application error when starting FixSqlRegistryKey_x86.exe

I have Windows 7 64bit. I had Sql Server 2008 R2 Express installed. I unistalled it and then I tried to install Sql Server 2008 R2 Web. Unfortunatelly on the Setup Support Rules page for 'Consistency validation for SQL Server registry keys' I got 'Failed'. I spent half of a day trying to solve it, but then I assumed that there must be realy something wrong with registry keys and it will be faster just to reinstall Windows.
After formatting the disk and reinstalling Windows 7, rebooting dozen of times I installed all Windows upadtes as well. I also did install some programs like Skype, Thundirbird etc. which has no influence on Sql Server setup.
And then I tried again to install Sql Server 2008 R2 Web. And again an error. A bit different one. Now when the setup is on the Setup Support Rules page I get an error message box with the title "FixSqlRegistryKey_x86 - Application Error" and content: The application was unable to start correctly (0xc000007b). Click OK to close the application. 'Consistency validation for SQL Server registry keys' gets 'Failed' status as well.
My team mate has exactly the same machine as mine. He had no problem with installation (he didnt even need to reinstall Windows).
I run the setup as administrator, from a local folder. I even tried to use the setup files copied from my team mate, for a case if my copy is corrupted. In the setup options I have chosen the 'x64' version.
Any ideas what can be the reason of the problem?
Problem solved.
Someone suggested to me that Web edition should not be installed on Win 7 (just on Windows Server). So perhaps installing a different version would work. My team mate perhaps succeeded acidentially - due to having sql server installed already in express edition... but it is just a guess.
Before I tried to install another edition of SqlServer, I downloaded 2008 Express version and I started the install. From the temporary folder created by the express edition I copied FixSqlRegistryKey_x86.exe file and I had overwritten the problematic file in the Web setup with this file.
I started the setup again. It passed the verification this time. But has crashed on a later point - setup unpacks the installation files to C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\SQLServer2008R2 and runs from it. So I needed to again overwrite the problematic file in this location. Now the installation succeeded.