gSyncit shown the error code 2503while tried to install

Hi –Ya,
When I try to install the gSyncit, ended up with this error 2503. Googled and find out that Windows user Access control setting is blocking the gSyncit install. How do I lower the UAC setting? Help me. Then help me to find the registration key EnableLUA property to 0. Struggling with this error, please help me to resolve this error. Thanks.

Error:
The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2503.
