What the advice says
PCWorld says VirusTotal passes files and links through multiple engines, so you get as many as 10+ opinions at once instead of the single one from your own antivirus. The method is simple. Paste a link into the URL tab, or upload a file already on your PC. The article is clear on one point: VirusTotal is not meant to replace your antivirus software, which is both proactive and reactive to threats.
Yee's reasoning is that handling suspicious material has its own risks. Windows may read a downloaded file's metadata, which for some malware is enough to trigger the payload. Just visiting a webpage can start a drive-by download or exploit a browser vulnerability. That is why she wants the check to happen before anything lands on the PC.
How many "opinions" you actually get
"10+" undersells it, but it also oversimplifies. VirusTotal's own documentation says it checks a file, URL, domain, IP address or file hash against more than 70 antivirus engines and blocklists. Those contributors aren't all antivirus products. The service's documentation lists a mix of antivirus engines, website scanners, file and URL analysis tools, and user contributions.
VirusTotal doesn't hand down its own verdict. It aggregates what others say. Its documentation says it shows each engine's detection label, and that most URL scanners separate malware, phishing and suspicious sites.
The privacy catch
Treat VirusTotal as a public service, not a private local scan. This matters most at work.
- VirusTotal's documentation says basic results go to the submitter and to the partner engines, which use them to improve their own systems.
- Scan reports are shared with the public VirusTotal community.
- The contents of submitted files or pages may also be shared with premium VirusTotal customers.
- Its API guidance says not to submit indicators containing sensitive, confidential or personally identifiable information.
- One third-party explainer gives the same practical advice: never upload personal ID documents, contracts or client data, and search by the file's hash instead.
If you upload something sensitive by mistake, VirusTotal's help page points you to its contact form. That is a way to report the problem. It isn't a promise of instant deletion.
Anything from work should go through your IT or security team and their approved analysis tools. VirusTotal does sell private scanning. Files sent through its private scanning endpoints aren't shared with other users or partners and stay only briefly. That is an API-based paid-tier feature, not what you get from the public website.
URL scans and file scans are not the same
A clean URL report doesn't mean the file behind it was checked. VirusTotal's documentation explains why.
- A URL scan tries to fetch the file at that address. It only sends non-text formats such as executables, images and music files for antivirus scanning. HTML, CSV and XML files aren't sent.
- The fetch can fail. VirusTotal lists network errors, content over 32MB, timeouts, servers that block it, and downloads that need a login, cookie or JavaScript check.
- URL scanners and antivirus engines are often independent products, even from the same vendor. A phishing page can be flagged while its HTML file isn't a threat to your computer. A malicious file can also be detected when the URL scanner doesn't know the site distributes it.
If the question is "is this download safe?", scan the file itself when you can. Use the URL check for "is this site known to be bad?"
Reading the results
- Zero detections is not a guarantee. The report reflects what the engines knew when they ran. New or targeted malware can slip through.
- One or two detections may be a false positive. One how-to guide notes that a few detections could mean a false positive or a new, previously unknown threat. Look at which engines flagged it and what labels they used. Consider whether you expected the file and where it came from.
- Many detections is a strong warning. Don't open it.
- Don't use detection counts to rank antivirus products. VirusTotal says it wasn't built for comparative testing. Its engines are command-line versions that may behave differently from desktop products. Some are tuned more aggressively. Some use settings that differ from the vendor's default for end users. A result is no substitute for Microsoft Defender or whatever protection you run.
- If your own file is wrongly flagged, VirusTotal can't change another vendor's detection. Its guidance is to click Reanalyse first, then dispute the detection with the vendor that flagged it.
Where PCWorld's framing needs a caveat
Yee calls VirusTotal a "first defense" and a "sentry," and she stresses that your antivirus keeps running in the background. That is fair for someone who is already wary. But VirusTotal only analyzes what you submit. It doesn't monitor your PC, it can't block a file from running, and it can't remove anything. The more accurate description is a second-opinion step, not protection.
Also, the right moment to upload a file is when there is no existing report and the file isn't confidential. Searching by hash first can save you an upload.
A practical routine
- For a suspicious link: copy it without opening it, choose the URL tab and paste it in. Treat the result as one input, not permission to click.
- For a downloaded file you don't trust: if it isn't sensitive or work-confidential, upload it to the file tab. Read the individual engine results, not just the count.
- For anything confidential or work-related: don't upload it. Ask IT or security for an approved method.
- Keep your installed antivirus on. Don't weaken it because a web report looked clean.
- Remember the limits: a clean report isn't proof, a few flags may be false positives, and a clean URL doesn't prove the download was scanned.
Bottom line
VirusTotal is a useful, free second opinion, and PCWorld is right to recommend it as a backup to your antivirus. Use it knowing that your uploads are shared, that a URL verdict isn't a file verdict, and that "no detections" means only "nothing found yet."