Hi,

You can install Mcafee on three of your computers, In order to resolve the problem please follow the below instructions. 

PART 1: UNINSTALL ALL MCAFEE PRODUCTS USING ADD/REMOVE PROGRAMS IN WINDOWS

1. Click Start then Control Panel

2. Click Swith to Classic View on the top-left hand side

3. Double-click Add/Remove Programs

4. Click Change or Remove programs on the left side

5. Look for McAfee Security Center. Select it and click Remove/Uninstall and follow the on screen instructions to complete the removal.

PART 2: DOWNLOAD THE MCAFEE REMOVAL TOOL

1. Open an Internet Explorer window by double-clicking the blue “e” icon on the Desktop.

2. Go to: http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe

3. Click Save and save the file on your Desktop.

4. Once the download completes, double-click MCPR.exe on your Desktop.

5. You will receive a Cleanup Successful message.

PART 3: DELETE TEMPORARY INTERNET FILES AND COOKIES

1. Open Internet Options.

Click on Start and Run. Type inetcpl.cpl and click Ok.

3. In Delete Browsing History, make sure the following items are checked:

a. Temporary Internet Files

b. Cookies

c. History

4. Click Delete

PART 4: DOWNLOAD MCAFEE

1. Restart computer.

2. Go to http://membercenter.msn.com/ and sign in using your MSN e-mail address and password.

3. Click on Install MSN Virus Guard.

4. Click on I Agree on the McAfee User License Agreement page.

5. Follow the instructions to download the program.

Thanks and regards

Mubarak