McAfee

ApplicationMusarubra

Also called mcafee antivirus, mcafee live, mcafee total protection

MusarubraSecurity

An OEM-bundled consumer suite. People search it when a trial nag appears. McUICnt.exe is a common UI process. It is not Windows Security.

What you need to know

McAfee is the OEM nag suite. Trellix is the work split.

Consumer McAfee ships on many new PCs as a trial. McUICnt.exe is a common UI process. The trial plus live Defender is a two-engine mess. Trellix is the enterprise product from the same history, not this download.

What is it?: OEM-bundled consumer AV
Why the nag?: Trial expired. Not a virus by itself
Same as Trellix?: No. Trellix is the enterprise split

Feex says

If McAfee came with the laptop and you never wanted it, I would uninstall the trial and let Windows Security own the slot. I would not leave McShield.exe and MsMpEng.exe both live.

What is McAfee?

McAfee is the consumer suite that ships as an OEM trial on many PCs. McUICnt.exe is a usual UI process. Trellix is the enterprise split.

If you have never used it

If a new PC nags McAfee, that is usually an OEM trial, not a virus named McUICnt.exe. Download or manage it from mcafee.com. Consumer McAfee is Musarubra. Enterprise Trellix is the split-off work product. The trial plus still-live Defender is the two-engine fight. Uninstall the trial if you will use Windows Security instead.

What is it used for?

OEM trial protection

The preinstall registers as antivirus until it expires and nags. That nag is licensing, not malware.

Total Protection extras

VPN and identity extras sit in paid bundles. The trial may only be the antivirus seat.

WebAdvisor toolbar

Browser add-ons are McAfee extras. They are not Edge and not Defender SmartScreen.

Who is it for?

People hunting the McAfee nag on a new laptop
Users who paid and still see Defender live
Anyone who confused consumer McAfee with Trellix at work

Current status

Actively sold as consumer McAfee under Musarubra. This article is not Trellix Endpoint.

How old is it?

John McAfee's company dates to 1987. Intel owned it, then the consumer brand stayed McAfee while enterprise became Trellix. Musarubra is the current consumer owner. A 1990s VirusScan floppy is not this nag.

Versions

Major channels first. Exact build numbers are not all verified here.

OEM trial

Total Protection

Trellix (enterprise, other product)

System requirements

Values follow the publisher's public guidance. Workload still changes the real need.

Minimum

Minimum system requirements
Operating system	Windows 10 or Windows 11, per current McAfee consumer support
RAM	McAfee lists a 2 GB class minimum on many pages. OEM trials still feel heavy on 4 GB laptops

Resource profile

CPU demand: On-access scanner plus nag UI
RAM demand: Several McAfee processes at idle

Installed processes

These executables belong to this product when it is installed.

Installed processes
McUICnt.exe	McAfee UI container on many consumer builds
McShield.exe	On-access scanner on many installs

Startup components

McAfee services start with Windows while the trial or paid suite is installed.

File locations

Common McAfee locations
Typical install	C:\Program Files\McAfee\

Common problems

Trial nag plus live Defender

Expired McAfee can keep UI processes while Defender also scans. Uninstall the trial or finish the purchase so one owner remains.

WebAdvisor leftover after uninstall

Browser extensions can survive the suite. Remove them in the browser, not by deleting System32.

Getting unstuck

Use McAfee Consumer Product Removal if Apps will not clear it

McAfee documents MCPR for stubborn OEM installs. Settings > Apps is the first try.

Check Windows Security after removal

Defender should become the owner again. If the page still names McAfee, a leftover service is registered.

Do not download Trellix for a home nag

Trellix is the enterprise line. Home users want mcafee.com or an uninstall, not a work sensor.

Alternatives

Windows Security after you remove the trial. Do not stack McAfee on Norton just because both came in mailers.

Official help and downloads

Start with the vendor. Random exe sites are not a support channel.

Official contacts
Download	www.mcafee.com/ Official installer or vendor page
Help	www.mcafee.com/support Vendor support
Official site	www.mcafee.com/ Start here, not a random exe host

Related hardware

OEM trials add idle RAM. The nag is not a GPU problem.

Technical details

Vendor version numbers change. This article does not pin a build.

Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Feex Reviewed. How we research.

McAfee official site · Vendor product page
McAfee help · Vendor support
Foxhole process map · First-party samples on Windows PCs. Not a lab benchmark.

Was this article useful?

A yes or no is enough. Pick a reason if you want, or add a short note.