A new computer should feel clean and fast, but preinstalled software, bundled utilities, and hidden startup items can make it feel anything but.
This guide explains how to remove suspicious programs from new computer setups on Windows and macOS, while helping you spot the difference between legitimate manufacturer tools and unwanted software.
What counts as a suspicious program?
Suspicious programs are applications that you did not intentionally install, cannot clearly identify, or do not trust enough to keep.
They may arrive as trial software, browser add-ons, system utilities, or background services that start automatically and consume resources.
Common red flags include:
- Unknown publisher names or unsigned software
- Programs that reinstall after removal
- Unusual pop-ups, browser redirects, or search engine changes
- High CPU, memory, or disk activity at startup
- Names that imitate legitimate system tools
- Software bundled with coupon apps, updaters, or “optimization” tools
On a brand-new device, some of these items may be OEM software from Dell, HP, Lenovo, ASUS, Acer, Microsoft, or Apple.
The goal is to remove unwanted software without deleting drivers, security components, or hardware support tools you may need later.
Check what was installed before you delete anything
Before removing programs, review the installed software list and startup items.
This helps you avoid deleting critical components such as graphics drivers, touchpad utilities, firmware tools, or antivirus software that came with the device.
On Windows 11 and Windows 10
- Open Settings and go to Apps or Apps & features.
- Sort by Install date to see recent additions.
- Open Task Manager and check the Startup tab.
- Look in Control Panel > Programs and Features for older desktop apps.
On macOS
- Open Applications in Finder and review unfamiliar apps.
- Check System Settings > General > Login Items.
- Look for browser extensions in Safari, Chrome, or Firefox.
- Review any security or device-management profiles under System Settings > Privacy & Security.
How to remove suspicious programs from new computer setups on Windows
Windows systems often include vendor utilities, trialware, and third-party extras.
Remove software methodically so you do not disrupt device support or security features.
Uninstall through Settings
- Open Settings and select Apps.
- Choose Installed apps or Apps & features.
- Search for unfamiliar names.
- Select the app, click Uninstall, and follow the prompts.
Use Control Panel for older software
- Open Control Panel.
- Select Programs and Features.
- Look for toolbars, system optimizers, coupon apps, or trial antivirus software.
- Uninstall items you do not recognize or need.
Disable suspicious startup entries
Some programs are not dangerous by name alone, but they should not launch with the system.
In Task Manager > Startup, disable entries with unclear publishers, duplicate utilities, or apps you do not use daily.
Remove browser add-ons
Browser hijackers often arrive as extensions.
Check Chrome, Edge, and Firefox extension pages, then remove anything unfamiliar, especially search helpers, coupon tools, download managers, and “security” add-ons you never installed.
How to remove suspicious programs from new computer setups on macOS
macOS generally has fewer unwanted programs than Windows, but adware, login items, and configuration profiles still appear on new devices.
Review both apps and system-level permissions.
Delete unwanted apps
- Open Finder and go to Applications.
- Drag unfamiliar apps to the Trash.
- Empty the Trash after confirming they are not needed.
Remove login items
- Open System Settings.
- Go to General and then Login Items.
- Remove apps that start automatically and are not essential.
Check for browser hijackers
Safari, Chrome, and Firefox can all be affected by malicious extensions or altered search settings.
Remove unknown extensions, reset the homepage if needed, and confirm that the default search engine is one you trust.
Review profiles and device management
If a new Mac shows management profiles you do not recognize, check System Settings > Privacy & Security for configuration profiles.
Corporate or school devices may legitimately use these, but personal computers usually should not.
Use security tools to verify what you found
If you are unsure whether a program is safe, use reputable security software before deleting it.
Microsoft Defender, Malwarebytes, Bitdefender, Norton, and similar tools can detect adware, spyware, trojans, and potentially unwanted programs (PUPs).
Good verification steps include:
- Run a full antivirus scan, not just a quick scan
- Check the file publisher and digital signature
- Search the exact program name with the device brand and model
- Compare it with the manufacturer’s support documentation
When in doubt, quarantine the item first if your security tool allows it.
This gives you a chance to test the system without permanently deleting something important.
Know which preinstalled apps are safe to keep
Not every preinstalled program is suspicious.
Manufacturers often include drivers, support utilities, BIOS update tools, camera software, audio enhancers, and hardware diagnostics.
These may look unnecessary, but they can support core features.
Usually safe to keep if they match your device brand:
- Audio, graphics, and touchpad drivers
- Vendor support apps for warranty or updates
- BIOS or firmware update utilities from the manufacturer
- Power management tools for laptops
- Security software already activated by the vendor
Usually safe to remove if unused:
- Trial antivirus software
- Demo games and promotional launchers
- Coupon or shopping assistants
- Third-party PC optimizers
- Duplicate media players and cloud sync tools
Reset the browser and clear cached data if behavior continues
If pop-ups, redirects, or unwanted search changes keep appearing after uninstalling software, the browser may still contain leftover settings or extensions.
Resetting the browser can remove persistent changes without affecting bookmarks in many cases.
After the reset, clear:
- Browsing history
- Cookies and cached files
- Saved site permissions
- Search engine preferences
Also check the desktop and taskbar shortcuts on Windows.
Some hijackers alter shortcut targets so the browser opens a malicious page instead of the homepage.
When to use Safe Mode or a clean boot
Some suspicious programs resist removal because they run in the background.
Safe Mode on Windows and a clean boot can make uninstalling easier by loading fewer services and startup apps.
On macOS, restarting and removing login items or using Recovery tools may help with stubborn software.
Use a safer boot environment when:
- An app cannot be uninstalled normally
- The program restarts immediately after deletion
- The computer is slow only during startup
- You suspect malware or rootkit behavior
Finish with basic hardening steps
Once suspicious software is gone, tighten the system so it stays clean.
- Install operating system updates
- Update drivers and firmware from the manufacturer only
- Enable automatic security updates
- Turn on firewall protection
- Review app permissions for camera, microphone, location, and accessibility access
- Create a restore point on Windows or a backup on macOS
These steps reduce the chance that unwanted software will return and make future cleanup much easier if something slips through.