Java Error opening registry key

Question

I get this error when I try to do anything with Java in command prompt   Error opening registry key  Software JavaSoft Java Runtime Environment 3  Error  could not find Java dll Error  could not find Java 2 Runtime Environment   I did screw around with deleting Java directories and registry a few days ago  I restarted computer and java was still working fine  then i restarted it again today and now I get this error  I have tried uninstalling and reinstalling but that doesn t seem to work  I have the latest java JRE installed and the path set in the environment variables  Anyone have any clue how to fix this

User · Answer

I followed multiple answers from above and got my issue resolved.

Issue:

Javac was on 13 from jdk but java was using 1.8 from jre so java threw incompatible runtime error

Fix:

Under Control Panel -> Programs: I uninstalled 1.8 (named Java 8 runtime) and DID NOT touch the other one (named Java (TM) SE Development Kit 13)
Deleted java.exe, javac.exe and javawc.exe files from: a. C:\Windows\system32 b. C:\Windows\SysWOW64 c. C:\ProgramData\Oracle\Java\javapath
The environment variable JDK_HOME was pointing to 13 but JAVA_HOME was pointing to 1.8 so i pointed JAVA_HOME to also use 13 which was C:\Program Files\Java\jdk-13.0.1
There was a Path variable under both User variables and system variables sections. For the one in user variables section, i added the string %JDK_HOME% - which translated automatically to the physical path. For the one under system variables, I deleted the path C:\ProgramData\Oracle\Java\javapath and added C:\Program Files\Java\jdk-13.0.1\bin

All good now! Thanks to all the people who answered, you rock!

User · Answer

Make sure you remove any java exe  javaw exe and javaws exe  from your system    if you have an x32 system  Win XP 32 bits  Windows System32 folder  if you have an x64 system  Win 7 64 bits  also do the same under Windows SysWOW64 folder

User · Answer

You will find a folder named  Oracle  on ProgramData folder in your windows installed drive  Remove the folder  Hope it will work  In my case my install drive is C and my path is C  ProgramData Oracle

User · Answer

Make sure to delete java references from system32  SysWOW64  and delete javapath from ProgramData Oracle Java  It solves the issue

User · Answer

I got this kind of error whe nI had JDK 1 7 before and I installed JAVA JDK 1 8 and pointed my JAVA HOME and PATH variables to JAVA 1 8 version  When I try to find the java version I got this error  I restarted my machine  and it works   It seems to be we have to restart the machine after modifying the environment variables

User · Answer

On Windows 10 I had just installed the JDK  and got these errors when checking the version  I had to delete all executable files starting with java  i e  java exe  javaw exe and javaws exe  from C  ProgramData Oracle Java javapath  And then  once deleted  re-run the JDK installer  restart my terminal program and java -v works

User · Answer

I had a similar problem  I had installed JDK7 update 1 but couldn t use it  probably because I found a JRE6 that I deleted after installing JDK7   Uninstalling JDK7 was impossible  The solution was to add the JRE registry entries by hand    HKEY LOCAL MACHINE SOFTWARE JavaSoft Java Runtime Environment   CurrentVersion   1 7    HKEY LOCAL MACHINE SOFTWARE JavaSoft Java Runtime Environment 1 7   JavaHome   C   Program Files  Java  jre7   RuntimeLib   C   Program Files  Java  jre7  bin  client  jvm dll    HKEY LOCAL MACHINE SOFTWARE JavaSoft Java Runtime Environment 1 7 0 01   JavaHome   C   Program Files  Java  jre7   RuntimeLib   C   Program Files  Java  jre7  bin  client  jvm dll    You ll have to adjust the above to your own directories and version   If this doesn t help  there s still JavaRa http   raproducts org wordpress

User · Answer

I would have tagged this as a comment but cant  dont have the rep  just wanted to thank Tilman  I was trying to get PDFsam  PDF Split and Merge  to work to no avail   At launch it would produce an error stating that it could not find JRE 1 6 0  I Have both 32 and 64 bit versions and they check out fine at the java website in their respective browsers   Tried uninstalling reinstalling and rebooting repeatedly as well as using JavaRa  No such luck  still no go   I looked in the registry after reading this post and there was no     SOFTWARE JavaSoft  key so I added each with their respective string values pointing to my x86 version  PDFsam is a 32bit program   This got past the first problem but an error popped up about amd64 libraries suggesting the machine wanted to run the 64bit version  So I changed the paths to the 64bit JRE and PDFsam now works    FYI - I got here by searching for Java registry keys after I was unable to launch javaw exe from command prompt  even after adding the requisite paths to system path   making the aforementioned changes solved this as well

User · Answer

Make sure you remove any java exe  javaw exe and javaws exe from your Windows System32 folder and if you have an x64 system  Win 7 64 bits  also do the same under Windows SysWOW64   If you can t find them at these locations  try deleting them from C  ProgramData Oracle Java javapath

User · Answer

In case a virus scanner  like McAfee  is running  try    Disable virus scanner Uninstall Java  via Control Panel   Programs and Features  Reinstall Java  from Java com  Re-enable virus scanner

User · Answer

There are 3 locations to check   Registry HKEY LOCAL MACHINE SOFTWARE JavaSoft Java Runtime Environment 1 8 0 xxx JavaHome Java Control Panel- Java tab - View - Path Environment Variables - Path   env Path    All 3 have to align  if you have multiple entires just remove the wrong ones  - thats all

User · Answer

Delete these 3 files present in your local at path C  ProgramData Oracle Java javapath  java exe javaw exe javaws exe   This solved the issue for me

User · Answer

I have Windows 7  I got the same problem after installing  PyCharm  I wasn t satisfied with PyCharm  so I decided to use Eclipse instead  This is when I discovered that things went wrong with my JDK  I used to have Java 9 x  So I decided to uninstall it and get the newer version  at my time it was Java 11 x  The same problem persisted   I followed most of the steps mentioned above in the post like  - Removing all java  exe files   - removing Java related entries from the registry   - Cleaning-up all unnecessary Java folders  However nothing helped  I still had something in the system referring to a broken Java pathname   What really brought remedy is the following   - Uninstalled what ever version of JDK I had at the moment   - Re-Installed the last JDK version I had before the problem took place  - Properly uninstall that version    - Install whatever latest version of SDK       That s it    at this point everything returned to normal     Except that Java 11 xx did not fix the system path automatically  I had to do it manually

User · Answer

Uninstall Java  via Control Panel   Programs and Features   Install Java JRE 7 --  OFFLINE  lt -- Configure JAVA HOME and Path    JAVA HOME  bin  PATH

User · Answer

I had the same   Error opening registry key  Software JavaSoft Java Runtime Environment   Clearing  Windows SysWOW64  doesn t help for Win7  In my case it installing JDK8 offline helped  from link

[java] Java Error opening registry key

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