The Symantec Backup Exec Environment Check is a utility that runs on a computer automatically during installation and that reports the following:
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If the computer meets the minimum requirements for installation, such as the operating system, disk and physical memory, sufficient logon account privileges. See System requirements. 
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If third-party software that uses Backup Exec ports is configured correctly. 
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If required components are installed, and if they are versions that are compatible with Backup Exec. 
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If previous versions of Backup Exec and Backup Exec options are installed. 
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If storage device hardware and associated drivers are properly installed and recognized by the Windows operating system. 
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If the computer meets the minimum requirements for installation of the Desktop and Laptop Option. 
One of the following results are reported for each item:
Table: Environment Check results
Although the Environment Check runs automatically during installation, you may want to run it manually before installing Backup Exec or before backing up data with Backup Exec.