Signs Your Business Computer May Be Infected

Common Warning Signs Small Businesses Should Not Ignore

Cyber threats often operate quietly, without obvious signs. For small businesses and professionals, malware or viruses can affect performance, compromise data, and increase the risk of more serious security issues.

Recognising early warning signs can help you respond before problems escalate, potentially saving time, money, and stress.

Slower Than Normal Performance

A noticeable drop in system performance is one of the most common indicators of infection. You might notice:

• Longer startup times

• Applications taking longer to open

• Frequent freezing or crashing

Malware often runs in the background, consuming system resources and slowing down day-to-day operations.

Unexpected Pop-Ups or Alerts

Pop-ups appearing outside normal browsing activity, or alerts warning of issues you didn’t initiate, may indicate malicious software.

These messages often try to pressure you into clicking links, installing software, or entering credentials. Interacting with them can make the problem worse.

Unusual Network or Internet Activity

Sudden slow internet speeds, intermittent connectivity, or unexplained spikes in data usage can be warning signs of malicious activity.

Some malware communicates with external servers or spreads across networks, which may put other devices in your business at risk.

System Changes You Didn’t Make

Be alert to changes you did not authorise, such as:

• New programs appearing unexpectedly

• Browser settings being altered

• Security software being disabled

• Files missing or renamed

These can indicate unauthorised access or malware operating on your system.

Suspicious Emails or Messages From Your Account

If clients or colleagues report receiving unusual emails or attachments from your account, your system could be compromised.

Malware can use infected computers to send phishing emails or spread further infections without your knowledge.

Antivirus Warnings or Disabled Protection

Repeated antivirus alerts, or security software that disables unexpectedly, should never be ignored.

These signs may indicate that malicious software is attempting to bypass protection or has already affected the system.

What to Do If You Notice These Signs

If you suspect your system may be infected:

• Stop using the affected device where possible

• Disconnect it from the internet and your internal network

• Avoid installing unverified software or attempting risky fixes

• Seek professional IT support promptly

Acting quickly can help limit potential damage and reduce downtime.

How Protect Your PC Supports Small Businesses

We provide remote IT security services across Australia, helping small businesses prevent threats, protect critical data, and maintain smooth, reliable operations.

Small Business IT Security Review – Proactive Protection
Gain visibility and control over your IT systems before problems occur:

• Security scanning to identify potential vulnerabilities
• Review of system configuration and protections
• Installation and configuration of ESET Small Business Security if required
• Documentation of your IT environment
• Practical recommendations to reduce risk and improve security

Virus and Malware Removal – Rapid Response
If a virus or malware incident occurs, our remote service restores stability quickly and safely:

• Identification and removal of active malware or viruses
• Stabilisation of affected systems
• Containment to limit further impact
• Guidance on strengthening security to prevent recurrence

Data Backup Strategy – Business Continuity and Data Protection
Ensure your critical business information is properly protected and recoverable:

• Identification of business-critical data
• Review of existing backup coverage
• Detection of gaps and risks
• Design of a clear, structured backup strategy
• Practical guidance to strengthen data resilience and recovery readiness

All work is handled securely and confidentially.
Remote delivery ensures businesses in regional and metropolitan areas receive the same expert support without the need for onsite visits.

Start Strengthening Your Business Security Today

Looking to reduce risk, strengthen resilience, or improve data protection? Book a complimentary 15-minute consultation to review your systems and explore which service best fits your business.

Need urgent assistance? If you suspect an active virus or malware issue, call 0493 881 503 for rapid support from our qualified IT professionals.