I cannot install sqldeveloper due to the error received: can't start because MSVCR71.dll is missing from your computer "can't start because MSVCR71.dll is missing from your computer". I have Windows 7 and jre installed and first time I have have installed the same sqldeveloper, but after I have tried to installed data modeler, sqldeveloper run in error. I have deleted first sqldeveloper that successfully being installed and then when try to reinstall the installation failed with the reason: "can't start because MSVCR71.dll is missing from your computer...". A new error occured after reinstallation: "Unable to launch the Java Virtual Machine located path...\..\jdk\jre\bin\client\jvm.dll""Please tell me if you have a clue how to fix it and install both sqldeveloper and data modeler. Thank you for your time to reply to my question. Best regards!