Windows
Slow performance caused by two antivirus products running at once
The computer was slow because two antivirus products were active at the same time. Sophos Endpoint Protection was removed because it was not managed locally.
Killed once by someone from XL.net, on 2026-04-10.
Affects
Apps
- Sophos Endpoint Protection
What you see
- The computer felt slow while antivirus software was running.
Why it happens
Likely Two antivirus products were installed and fighting for resources.
When it shows up
A Windows computer has more than one antivirus product installed and performance is poor.
You are in this case if:
- Sophos Endpoint Protection is installed alongside another antivirus product.
- Two antivirus products are active at the same time.
1 fix below
The steps that killed it
The steps are behind a quick check
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Keeping it away
- Do not run two antivirus products on the same machine unless one is specifically required and managed.
Someone from XL.net killed this on a Windows computer on 2026-04-10. It is written up from that one repair, so it cites no outside page.