I downloaded the latest version of the Arduino software and installed it on my Win 7 32 bit laptop. The old version worked but I deleted it per the install. The new version pops up the splash screen and then closes. Nothing else happens.
Maybe this will help:
INFO: ****************************************
INFO: 08/06/2016 12:40:11
INFO: Product Version 2.1.0.0.
INFO: Version: 6.1.7601 Service Pack 1
INFO: Platform ID: 2 (NT)
INFO: Service Pack: 1.0
INFO: Suite: 0x0100, Product Type: 1
INFO: Architecture: X86.
INFO: Interactive Windows Station
INFO: Command Line: '"C:\Program Files\Arduino\drivers\dpinst-x86.exe" /lm /sw /sa'
INFO: DPInst is not multi-lingual.
INFO: ****************************************
INFO: Current working directory: 'C:\Program Files\Arduino\drivers'
INFO: Running on path 'C:\Program Files\Arduino\drivers'
INFO: No valid 'dpinst.xml' file provided.
INFO: Install option set: Suppressing Wizard but no OS popups.
INFO: Install option set: legacy mode on.
INFO: Install option set: Suppress Add or Remove Programs entries.
INFO: Found driver package: 'C:\Program Files\Arduino\drivers\arduino-org.inf'.
INFO: Found driver package: 'C:\Program Files\Arduino\drivers\arduino.inf'.
INFO: Found driver package: 'C:\Program Files\Arduino\drivers\arduino_gemma.inf'.
INFO: Found driver package: 'C:\Program Files\Arduino\drivers\genuino.inf'.
INFO: Preinstalling 'c:\program files\arduino\drivers\arduino-org.inf' ...
INFO: ENTER: DriverPackagePreinstallW
INFO: Driver package is already preinstalled 'c:\program files\arduino\drivers\arduino-org.inf'.
SUCCESS:c:\program files\arduino\drivers\arduino-org.inf is preinstalled.
INFO: RETURN: DriverPackagePreinstallW (0xB7)
INFO: ENTER: DriverPackageGetPathW
INFO: RETURN: DriverPackageGetPathW (0x0)
INFO: Preinstalling 'c:\program files\arduino\drivers\arduino.inf' ...
INFO: ENTER: DriverPackagePreinstallW
SUCCESS:c:\program files\arduino\drivers\arduino.inf is preinstalled.
INFO: RETURN: DriverPackagePreinstallW (0x0)
INFO: ENTER: DriverPackageGetPathW
INFO: RETURN: DriverPackageGetPathW (0x0)
INFO: Preinstalling 'c:\program files\arduino\drivers\arduino_gemma.inf' ...
INFO: ENTER: DriverPackagePreinstallW
INFO: Driver package is already preinstalled 'c:\program files\arduino\drivers\arduino_gemma.inf'.
SUCCESS:c:\program files\arduino\drivers\arduino_gemma.inf is preinstalled.
INFO: RETURN: DriverPackagePreinstallW (0xB7)
INFO: ENTER: DriverPackageGetPathW
INFO: RETURN: DriverPackageGetPathW (0x0)
INFO: Preinstalling 'c:\program files\arduino\drivers\genuino.inf' ...
INFO: ENTER: DriverPackagePreinstallW
INFO: Driver package is already preinstalled 'c:\program files\arduino\drivers\genuino.inf'.
SUCCESS:c:\program files\arduino\drivers\genuino.inf is preinstalled.
INFO: RETURN: DriverPackagePreinstallW (0xB7)
INFO: ENTER: DriverPackageGetPathW
INFO: RETURN: DriverPackageGetPathW (0x0)
INFO: ENTER: DriverPackageInstallW
WARNING:DRIVER_PACKAGE_LEGACY_MODE flag set but not supported on Plug and Play driver on VISTA. Flag will be ignored.
INFO: Installing INF file 'c:\program files\arduino\drivers\arduino-org.inf' (Plug and Play).
INFO: Looking for Model Section [DeviceList]...
INFO: No matching devices found in INF "C:\Windows\System32\DriverStore\FileRepository\arduino-org.inf_x86_neutral_4eb7217261122b57\arduino-org.inf" on the Machine.
INFO: No drivers installed. No devices found that match driver(s) contained in 'C:\Windows\System32\DriverStore\FileRepository\arduino-org.inf_x86_neutral_4eb7217261122b57\arduino-org.inf'.
INFO: RETURN: DriverPackageInstallW (0xE000020B)
INFO: No matching device was found for 'c:\program files\arduino\drivers\arduino-org.inf'. Driver will be installed when plugged in.
INFO: ENTER: DriverPackageInstallW
WARNING:DRIVER_PACKAGE_LEGACY_MODE flag set but not supported on Plug and Play driver on VISTA. Flag will be ignored.
INFO: Installing INF file 'c:\program files\arduino\drivers\arduino.inf' (Plug and Play).
INFO: Looking for Model Section [DeviceList]...
The latest IDE is pretty bug ridden as seen by the amount of posts mentioning it.
Preferred versions are 1.6.5 r5 and 1.6.9 (1.6.5 r5 if using ESP 8266 boards)
May I suggest you uninstall your current version and go back to a known working version.
Sometimes latest isn't always the best especially with the IDE.
It may also be of benefit to do a clean up after the uninstall (both registry and cache etc)
For a really clean install of the earlier version, after uninstalling IDE V1.6.10, it's a good idea to delete the "Arduino15" folder before installing the IDE again. It's located here:- "C:\Users\your name\AppData\Local\Arduino15"
N.B. The "AppData" folder might be hidden, (it is in Windows 10), so you might need to change your settings to view hidden items before you can see it.