You can repair UFT 12.51 or LeanFT with the below steps:

**Windows 7**

Press the 'Start' button

Find command prompt and right click on it.

Select ''Run as Administrator''. A Dos Prompt will appear.

Copy the following command to the dos prompt and press enter.

UFT 12.51:

MsiExec.exe /fm {52EECD3F-367A-4D9A-A08A-7D1BDA2E5CA7}

Lean FT:

MsiExec.exe /fm {671E8206-46CA-4150-AC64-C6075903A687}

**Windows 8/8.1**

From the Charms screen, start typing the word 'Command'. A list of matching programs will appear.

Right click 'Command Prompt'.

Select Run As Administrator. A Dos Prompt will appear.

Copy the following command to the dos prompt and press enter.

UFT 12.51:

MsiExec.exe /fm {52EECD3F-367A-4D9A-A08A-7D1BDA2E5CA7}

Lean FT:

MsiExec.exe /fm {671E8206-46CA-4150-AC64-C6075903A687}

**Windows 10**

Press the 'Start' button

Start typing ''Command'' and the Command Prompt should appear on the list. Right click on it.

Select ''Run as Administrator''. A Dos Prompt will appear.

Copy the following command to the dos prompt and press enter.

UFT 12.51:

MsiExec.exe /fm {52EECD3F-367A-4D9A-A08A-7D1BDA2E5CA7}

Lean FT:

MsiExec.exe /fm {671E8206-46CA-4150-AC64-C6075903A687}