Hello,
You can try the following steps to move the data folder path to an alternate location where you have enough disk space.
1. Stop all Backup Exec Services in Services window.
2. Locate the Data folder for Backup Exec, the default install directory is C:\Program Files\VERITAS\Backup Exec\NT\Data.
3. Copy the Data Folder to your new location, i.e. D:\Data.
4. Open REGEDT32.
Then here you can browse to the location : HKEY_ LOCAL_MACHINE\SOFTWARE\VERITAS\Backup Exec\Engine\Misc where you can enter the alternate data path.
Please write to us if the issue persists.
Additional Information :
For information on the recent VERITAS Backup Exec security vulnerabilities, including links to the downloads for the necessary hotfixes, please refer to the following document:
Patch summary for Security Advisories VX05-001, VX05-002, VX05-003, VX05-005, VX05-006, VX05-007
http://seer.support.veritas.com/docs/277429.htm