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4. PRECAUTIONS WHILE THE OS IS RUNNING
4.4 Security Enhancement Function
Windows® 10
In Windows® 10, a spyware preventive function Windows Defender has been enabled. The
Windows Defender also includes a virus preventive function. This virus preventive function
may adversely impact application performance compared with when using Windows® 7 in
some cases.
Windows® 7
In Windows® 7, a spyware preventive function Windows Defender has been scheduled and is
executed regularly on the background. We recommend that you change the scheduled time as
needed so as not to overlap with the operation schedule of job applications.
The initial schedule settings are shown below.
• Frequency: Every day
• Approximate time: 2:00
4.5 Factory-Shipped Network Settings
Turning off SNP (Scalable Networking Pack)
The purpose of SNP is to reduce the processor load by delegating TCP-related processing to
the network adapter. SNP is made of the following three features.
・ TCP Chimney Offload
・ Receive Side Scaling (RSS)
・ Network Direct Memory Access (NetDMA)
Unfortunately, if the system in Windows® is used with SNP turned on, processing the
network may become unstable, or the network performance may be reduced when you use the
network in specific ways. This is why SNP is disabled in this equipment.
In Windows® 10 and Windows Server® 2016, TCP Chimney Offload and Network Direct
Memory Access are not supported by OS, so that we set only Receive Side Scaling (RSS) for
invalidity.
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