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Please follow these instructions:


Note that you need to install the software while the Windows UAC is OFF and after rebooting the PC.

(VisiLogic V9.7.24 recommended)

Turn OFF Windows UAC.

1.    Delete the file Current_OPLC.udb from: C:\Program Files\Unitronics\Unitronics VisiLogic_C\Data\DB

2.    Backup you projects and delete all the files related to Unitronics installations.

3.    Erase the “Unitronics VisiLogic_C”  folder  from- C:\Program Files\Unitronics

4.    Erase the “Unitronics”  folder  from- C:\Program Files\Common Files.

5.    Perform Windows update and restart the PC

6.    Log-on as administrator

Save the setup file on your desktop and make sure that the installation file is not blocked (Right click on the file>Properties) If yes, just click on the unblock button:



Install VisiLogic.


If software opened properly, Go to the properties of VisiLogic shortcut and under compatibility ticked verify the Privilege Level “Run this program as an administrator”.


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Thank you. Looks like it worked, but I need a little bit more time to be sure that is really OK now.


It really sounds a bit complicated as just for the normal program installalation :)

In normal installations this is not needed, and in most cases this process can be much shorter.

However, it is better to take the longer path to a guaranteed success :)

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