I recently switched my internet service from Comcast to AT&T. Both offer McAfee free. Should I have uninstalled McAfee from my computer before I installed it from AT&T? When I bring up the security suite, it still says "Comcast" at the top, and I no longer use Comcast.
Yes you should have used the removal tool as some of the branding must have been left behind.
Temporarily enable Windows Firewall to afford some protectection during the following procedure...
1. Uninstall all McAfee programs through "Add or Remove Programs" in Windows "Control Panel".
2. Use the MCPR tool, see this article: How to remove supported McAfee consumer products using the McAfee Consumer Products Removal tool (MC... This will remove all McAfee remnants from your computer. (You must have Windows 7, Vista, XP or 2000, SP4 to use this tool)
3. Launch Windows Explorer and delete all McAfee files in "Program Files" but especially in "C:\Document and Settings\<user>\Application Data" and "C:\Document and Settings\All Users\Application Data". You have to set Windows Explorer to show all hidden files and folders (Tools > Folder Options > View tab). Just delete the McAfee folders even if they are empty in all the "Application Data" folders. Can be more than one!
In Vista: C:\Program Files, C:\ProgramData and C:\Users\yourname\AppData\Roaming
If you can't find these files don't worry. It just means that MCPR has done its job.
4. Reboot and redownload/reinstall your McAfee products directly from your account at the McAfee web site.
If you are a McAfee direct customer, go to https://home.mcafee.com/Secure/Protected/Login.aspx and log in to download your McAfee products.
If you received your McAfee products from your service provider, please use the list below to download your software.
AT&T users should go to https://uversecentral1.att.com/uvp/myhome/mam/ISS/