You need to add Tally.ERP 9 or data files to the exception list of Windows Defender of Windows Vista to allow Tally.ERP 9 to send information to or from your computer through the Windows Firewall.
To add Tally.ERP 9 data files to the exception list in Windows Defender of Windows Vista
1. Go to Control Panel and select Windows Defender.
2. Click Tools > Options > Advanced options.
3. Click Add in the field Do not scan these files or locations.
4. Click Save.
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