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https://help.tallysolutions.com/docs/te9rel66/Installation/Opening_Tally_from_admin_in_Win_2008.htm

How do I run Tally.ERP 9 in administrator mode in Windows 2008?

You need to run Tally.ERP 9 in administrator mode to perform most of the licensing related operations.

To run Tally.ERP 9 with administrator rights

1. Go to the folder where Tally.ERP 9 is installed.

2. Right-click your tally.exe.

3. Select Properties .

4. Click Compatibility .

5. Check the option Run this program as an administrator .

6. Click OK to save the settings.

Or

1. Go to the folder where Tally.ERP 9 is installed.

2. Right-click your tally.exe.

3. Select 'Run as administrator' .