"My computer is slow" is one of the most common things we hear, and it has several possible causes — a virus is only one of them.
Signs that point to malware or a virus
Pop-ups with the browser closed, a changed homepage, unrecognised startup programs, a loud fan at idle, or disabled antivirus software.
Signs that point to normal wear, not a virus
Gradual slowdown over years, a nearly full hard drive, too many startup programs, or simply an aging machine.
Why 'just run an antivirus scan' isn't always enough
Some malware hides from common antivirus tools or disables them entirely.
What we actually do
We run a full diagnostic checking both malware presence and hardware/software performance, rather than assuming it's one or the other.