Every week, customers walk into our Roswell shop carrying laptops and desktops that are running sluggishly, showing strange pop-ups, or have simply stopped working. A surprisingly large percentage of those machines have one thing in common: malware. It's one of the most common — and most misunderstood — problems we treat every single day.
This guide is written by our technicians to give you a clear, honest picture of what malware actually is, how it gets onto your machine, what it does once it's there, the warning signs to watch for, and exactly how we go about diagnosing and completely removing it from PCs and Macs alike.
What Exactly Is Malware?
The word malware is a portmanteau of "malicious software." It refers to any program, script, or code that is intentionally designed to disrupt, damage, spy on, or gain unauthorized access to a computer system — without the owner's knowledge or consent.
Malware is not a single thing. It's a broad category that encompasses dozens of different threat types, from annoying adware that floods your screen with pop-ups to devastating ransomware that encrypts every file on your machine and demands payment. What unites them all is intent: they are designed to work against you.
Contrary to popular belief, Macs are not immune. While Windows PCs have historically been the primary target due to their market share, macOS malware has increased sharply year over year. Our shop treats infected Macs regularly, and customers are often shocked — they assumed Apple's ecosystem made them untouchable.
By the numbers: Cybersecurity researchers document hundreds of thousands of new malware variants every single day. The vast majority target everyday users — not corporations — through phishing emails, fake software downloads, and compromised websites. No device connected to the internet is risk-free.
The Main Types of Malware
Understanding the different categories of malware helps explain why they require different diagnostic approaches and removal strategies. Here are the most common types we encounter at our Roswell shop:
Viruses
Self-replicating code that attaches itself to legitimate programs. Spreads when an infected file is opened or shared. Can corrupt data, slow performance, and damage the OS.
Trojans
Disguised as legitimate software — a free game, a PDF reader, a "system update." Once installed, they open a backdoor for attackers or silently download additional malware.
Spyware
Silently monitors your activity — keystrokes, browsing habits, login credentials, bank details — and transmits that information to a remote attacker. Often invisible to the user.
Ransomware
Encrypts your files and demands a cryptocurrency ransom for the decryption key. One of the most devastating forms. Even paying the ransom doesn't guarantee recovery.
Worms
Spread across networks without user interaction. Once inside a system, they replicate rapidly — clogging bandwidth, dropping additional payloads, and hopping to every connected device.
Rootkits
The stealthiest class of malware. Designed to hide deep in your OS — sometimes in the bootloader or firmware — making them invisible to standard antivirus tools and very difficult to remove.
Adware
Injects unwanted advertisements into your browser or desktop. While less dangerous than ransomware, it slows systems significantly and often bundles spyware as a secondary payload.
Keyloggers
Record every keystroke you make — passwords, credit card numbers, messages — and quietly send them to attackers. Often deployed as part of a broader spyware or banking trojan infection.
How Does Malware Get on Your Computer?
Malware doesn't just appear out of thin air. It has to be delivered and executed — and attackers have become remarkably sophisticated at tricking people into doing exactly that without realizing it. The most common infection vectors we see in our customers' machines include:
- Phishing emails — A fake email from "your bank," "FedEx," or "Microsoft" contains a malicious attachment or a link to a spoofed website that installs malware the moment you visit.
- Drive-by downloads — Visiting a compromised or malicious website automatically downloads malware to your machine, often without any click required.
- Fake software and cracks — Pirated programs, "free" versions of paid software, and cracked games are among the most common carriers of trojans and ransomware.
- Malicious ads (malvertising) — Even legitimate websites can serve infected ads purchased through compromised ad networks.
- USB drives — Plugging in a found or borrowed USB drive can auto-execute malware, especially on Windows systems.
- Software vulnerabilities — Outdated operating systems, browsers, and plugins contain security holes that automated exploit kits target continuously.
- Social engineering — Fake tech support calls, pop-ups claiming your computer is infected, or someone convincing you to install "remote help" software.
Warning Signs Your Computer May Be Infected
Malware is designed to operate quietly, but it almost always leaves traces. Here are the most common symptoms our customers report when they bring in an infected machine:
Don't wait if you see these signs. Many malware types continue to cause damage, spread to other devices on your network, and exfiltrate your data the entire time they remain active. The longer an infection goes untreated, the more difficult — and costly — the cleanup becomes.
How Computer Repair Roswell Diagnoses Malware
This is where our process is fundamentally different from running a consumer antivirus scan and calling it done. A consumer antivirus catches what it knows about — but sophisticated malware is specifically engineered to evade standard detection. Our diagnostic process treats every infection as unique and goes deeper than any automated tool alone can reach.
Here's what each stage of our diagnostic process actually involves:
Initial Triage — Understanding the Behavior
Before we run a single scan, we talk with you and observe the machine. How does it behave on boot? What symptoms are you seeing? Does it connect to the internet? Have you seen any ransom messages? This intake conversation shapes everything that follows, helping us narrow the likely threat family before we ever open a diagnostic tool.
Live Process & Startup Audit
With the machine running, we examine every active process, service, and scheduled task using specialized tools. We review the startup registry, launch agents (on Mac), and loaded browser extensions. Malware almost always needs to run at startup or persist as a background process — and that persistence has to leave a footprint.
Multi-Engine Deep Scan
We don't rely on a single antivirus. We run multiple specialized scanners — each with different signature databases and heuristic engines — because no single tool catches everything. For Mac infections, we use macOS-specific tools alongside cross-platform utilities. We scan all drives, mounted volumes, and temporary file locations that consumer tools often miss.
Rootkit & Bootloader Probe
Standard scans operate at the OS level — but rootkits hide below it, in the bootloader, firmware, or kernel. For suspected rootkit infections, we boot from a clean external drive to examine the system without the malware having any opportunity to hide itself. This is a critical step that most home users and consumer tools entirely skip.
Threat Report & Transparent Quote
We document everything we found — threat names, infection locations, what was affected, and what we recommend. We explain it in plain language. Then we give you a firm quote. You decide what to do next. We never start any remediation work without your approval, and we never pad a diagnosis to sell more services.
How We Remove Malware — Completely
Diagnosis tells us what we're dealing with. Removal is where our certified technicians earn their reputation. Our remediation philosophy is thorough — we don't just quarantine detected files and call it done. That approach often leaves rootkit components, modified registry entries, or persistence mechanisms in place, allowing the infection to return within days.
Our full removal process covers every layer of your system:
- Malicious file removal — Every identified malware file, dropper, and payload is located and deleted from all storage locations, including hidden directories and temp folders.
- Registry & launch agent cleanup — On Windows, infected registry keys are corrected. On Mac, malicious launch daemons, agents, and login items are removed. These are the mechanisms that bring malware back after a restart.
- Browser remediation — We remove malicious extensions, reset homepage and search engine settings, and clear injected certificates or proxy redirects that malware commonly installs in Chrome, Firefox, Safari, and Edge.
- Rootkit eradication — For confirmed rootkit infections, we may need to perform an OS reinstall with a clean system image, while backing up and scanning your personal files separately before restoring them.
- OS and software patching — We update Windows or macOS and close the specific vulnerability that allowed the infection in the first place. Removing malware from an unpatched system just invites reinfection.
- Credential change guidance — If we find evidence of spyware, keyloggers, or data exfiltration, we walk you through which accounts and passwords should be changed immediately.
A note on ransomware: If your files have been encrypted by ransomware, do not pay the ransom before consulting us. Payment doesn't guarantee recovery, and we may be able to restore data through shadow copies, backups, or known decryptors — at significantly less cost and risk than a ransom payment.
Macs Get Malware Too — And It's Growing
One of the most persistent myths we encounter is that Macs don't get viruses. This was only partially true in the past when macOS had a tiny market share and wasn't worth targeting. Today, Macs represent a significant share of consumer and business machines, and attackers have followed the users.
Common Mac-specific malware types include adware bundles (often disguised as Adobe Flash or VLC installers), fake antivirus scareware, banking trojans targeting macOS browsers, and increasingly, ransomware variants written natively for Apple Silicon. macOS's Gatekeeper and XProtect provide some protection but are not impenetrable — and older macOS versions receive substantially fewer protections.
Our technicians are trained on both platforms. We use macOS-specific diagnostic tools alongside cross-platform utilities, and we understand the nuances of Apple's security architecture — including System Integrity Protection (SIP), the quarantine flag, and notarization checks — that affect both how malware operates and how it's removed on a Mac.
After Removal: How We Protect You Going Forward
Getting the malware off your machine is step one. Making sure it — or the next wave — doesn't come back is step two, and it's just as important. Before we return your device, we walk through a personalized protection checklist with every customer:
- Install a reputable real-time antivirus — We recommend specific tools based on your OS, usage, and budget. We install and configure it correctly so it actually runs.
- Enable automatic OS updates — Patched systems are dramatically harder to compromise. We enable and verify automatic updates are working before you leave.
- Enable Windows Defender or macOS built-in protections — These are surprisingly strong when configured properly — most infected machines had them disabled.
- Review your browser extensions — We go through what's installed and explain what should and shouldn't be there.
- Enable two-factor authentication — Especially for email, banking, and any account where your credentials may have been compromised.
- Set up regular backups — The single best protection against ransomware is a current, tested backup on a drive that isn't always connected to your computer.
Our 90-Day Warranty covers every malware removal. If the same infection returns within 90 days of our service, we remove it again at no charge. We stand behind our work completely — and that guarantee is in writing every time.
Bring Your Device to Computer Repair Roswell
If your PC or Mac is showing any of the symptoms listed above — or if you simply haven't had a malware check in the past year — bring it in. Our Roswell shop offers a free initial assessment, and most malware diagnostics are completed same-day.
We serve customers from across the North Atlanta metro: Roswell, Alpharetta, Sandy Springs, Marietta, Johns Creek, Milton, Dunwoody, and beyond. Walk-ins are welcome, or submit a repair request online and we'll respond within the hour.
There's no pressure and no obligation from the diagnostic. You'll know exactly what's on your machine and exactly what it will cost to fix it — before we do anything.
Think Your Computer May Be Infected?
Our certified technicians offer same-day malware diagnostics with a free initial assessment. No fix, no fee.