> Source: [sk168340](https://support.checkpoint.com/results/sk/sk168340)

# sk168340 - Anti-Virus Deep Scan causes performance issues

| Property | Value |
|----------|-------|
| Solution ID | sk168340 |
| Date Created | 2020-08-03 |
| Last Modified | 2020-08-05 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- * Anti-Virus Deep Scan causes performance issues, for example, websites do not load or take a long time to load.

* Disabling Anti-Virus Deep Scan resolves the issue.

* Anti-Virus logs show:  
  `
  Reason Timeout was exceeded`  
  `
  Precise Error unknown error`

* There is an increase in CPU and memory utilization.

## Cause

Anti-Virus Deep Scan utilizes parts of Threat Emulation engine even if Threat Emulation is disable.   

There is a mismatch between some of the libraries builds used by Anti-Virus Deep Scan engine that caused the engine not to start.

## Solution

This solution requires authentication. Please log in to view the full solution.

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