Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
( i ) except as necessary to maintain your own computer security by use of commercial-off-the-shelf anti-virus or anti-malware products , you will not attempt to probe , scan , or test the vulnerability of the products or any other headspace system or network or breach any security or authentication measures . 

```
. OPTIONS: ['Arbitration' 'Unilateral termination' 'Jurisdiction' 'Contract by using'
 'Choice of law' 'Content removal' 'Limitation of liability'
 'Unilateral change' 'None'].