Antivirus Software in 2026: Does It Still Slow Down Your PC? Shocking Test Results Revealed

In a comprehensive investigation published this week, Tom's Guide put modern antivirus suites to the test to answer a question that has plagued PC users for decades: does security software still slow down your computer? The tests, conducted in early 2026, employed both synthetic benchmarks and resource-intensive PC games to measure the performance impact of leading antivirus programs. The findings indicate that the slowdown myth may no longer hold true, with most suites showing negligible effects on overall system responsiveness.

The testing methodology involved running a battery of benchmarks, including CPU and disk-intensive tasks, as well as popular games, with and without antivirus software active. According to Tom's Guide, the results revealed that modern antivirus solutions have significantly optimized their scanning processes, often leveraging cloud-based detection and machine learning to minimize local resource usage. While some suites did cause minor slowdowns during full-system scans, the impact during everyday use and gaming was largely imperceptible. The report notes that factors such as hardware specifications and specific antivirus settings can influence performance, but overall, the gap between protected and unprotected systems has narrowed considerably.

These findings have implications for consumers and businesses alike, as they weigh the trade-off between security and performance. The cybersecurity landscape continues to evolve, with threats becoming more sophisticated, making antivirus software more essential than ever. However, the reduced performance overhead means users no longer have to choose between protection and speed. Tom's Guide recommends that users select a reputable antivirus solution and configure it appropriately for their needs, as the benefits far outweigh any minimal performance cost. The full test results and detailed analysis are available on Tom's Guide's website.