Spyware is a type of malicious software (malware) that secretly collects information from a device without the user’s knowledge or permission.
Introduction
Spyware is designed to monitor activity on a computer, tablet, or smartphone and send information back to a third party.
Depending on the type of spyware, it may collect:
- Browsing habits
- Search history
- Login details
- Personal information
- Financial information
- Keystrokes entered on a keyboard
Unlike ransomware, which announces its presence by locking files, spyware often tries to remain hidden for as long as possible.
How Does Spyware Get Onto a Device?
Spyware can arrive through:
Malicious Downloads
Downloading software from untrusted websites can sometimes include hidden spyware.
Fake Software Updates
Attackers may create fake update messages for:
- Browsers
- Media players
- Security software
These fake updates can install malware instead of legitimate software.
Email Attachments
Opening malicious attachments from phishing emails can result in spyware being installed.
Bundled Software
Some free applications may include unwanted software that collects information about users.
What Information Can Spyware Collect?
Depending on its design, spyware may attempt to collect:
✅ Websites visited
✅ Search history
✅ Usernames
✅ Passwords
✅ Financial information
✅ Application usage
✅ Device information
Some advanced spyware may even record keyboard activity.
Common Signs of Spyware
Spyware is often difficult to detect, but some common warning signs include:
Slower Computer Performance
The device may become noticeably slower as spyware runs in the background.
Unexpected Pop-Ups
You may see:
- Frequent advertisements
- Browser redirects
- Unwanted notifications
Changed Browser Settings
Your browser homepage or search engine may change without your permission.
Unusual Network Activity
Spyware often sends information across the internet, which may increase network usage.
Unknown Applications
Applications you do not recognise may appear on the system.
What Is the Difference Between Spyware and Viruses?
| Feature | Spyware | Virus |
|---|---|---|
| Collects Information | ✅ | Sometimes |
| Spreads Itself | Usually No | Often Yes |
| Operates Silently | ✅ | Not Always |
| Damages Files | Rarely | Often |
| Monitors Activity | ✅ | Rarely |
While both are forms of malware, spyware is primarily focused on collecting information rather than damaging files.
How to Protect Yourself
Keep Software Updated
Install updates for:
✅ Windows
✅ macOS
✅ Browsers
✅ Applications
Security updates often close vulnerabilities that malware may exploit.
Use Antivirus and Anti-Malware Software
Modern security software can help detect and remove spyware.
Examples include:
- Microsoft Defender
- Malwarebytes
- Bitdefender
- Avast
Download Software From Trusted Sources
Avoid downloading programs from unknown websites.
Whenever possible:
✅ Use official vendor websites
✅ Use trusted app stores
Be Cautious of Email Attachments
Do not open unexpected attachments or links without verifying the source.
What Should You Do If You Suspect Spyware?
If you believe a device may be infected:
✅ Disconnect from the internet if possible
✅ Run a full antivirus scan
✅ Run an anti-malware scan
✅ Remove suspicious software
✅ Change important passwords
✅ Enable Multi-Factor Authentication (MFA)
✅ Monitor accounts for unusual activity
Best Practice Checklist
✅ Keep software updated
✅ Use reputable antivirus software
✅ Download software from trusted sources
✅ Avoid suspicious email attachments
✅ Enable Multi-Factor Authentication
✅ Review installed applications regularly
✅ Scan your device periodically
✅ Back up important data
Key Takeaway
Spyware is a type of malware that secretly monitors activity and collects information from a device. Because it often operates quietly in the background, infections can sometimes go unnoticed for extended periods. Keeping software updated, using reputable security software, and being cautious about downloads and email attachments can significantly reduce the risk of becoming a victim of spyware.