You do not provide enough details. If you followed the instructions on the following page...
it should work. Some key points to review:
1.You must have a recent 32-bit Java 7 JDK installed (not the JRE).
2. Unzip the sqldeveloper-184.108.40.206.80-no-jre.zip into an empty directory
3. Make sure no administrator has locked down your C:\User\<youruserid>\AppData\Roaming directory. It must be writable.
Hope this helps,
SQL Developer Team
Also frustrated here with 220.127.116.11.48 installation.
I've downloaded and installed jdk-7u55-windows-x64.exe.
Then downloaded the sqldeveloper-18.104.22.168.48-x64.zip and extracted to an empty folder on my C: drive.
Then when i run the sqldeveloper.exe is DOES NOT prompt me for the path the JAVA (what is the default path anyhow ??), and a large white screen with a short meaningless menu pops up about 10% into the load.
It hangs there..when i close this odd menu screen the sqldeveloper.exe load stops.
On a Win7 Enterprise SP1... 64bit system.
The old version of SqlDeveloper 3.2 continues to work fine, thankfully.
SQLDev in v4 auto-detects your JDK - so it should be finding your jdk7u55 install and setting that as your java home - that's why you're not getting a prompt.
What happens if you go down into the bin directory, and launch the EXE from there? You should get a cmd/shell window with more feedback - showing error messages, etc.