DVR systems PSS ENG - Manual (Page 12)

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Figure 2-9
Click Yes button to remove PSS.
2.2.2 Start Menu
From Start menu-> All programs->PSS, select PSS uninstall item.
System pops up the following dialogue box. See Figure 2-10. Please click yes to remove PSS.
Figure 2-10
2.2.3 Resource CD
You can click the PSSSetup.ms in the installation CD, system pops up the following dialogue box.
Please select remove PSS item to delete it. See Figure 2-11.
Figure 2-11
2.3 Upgrade
2.3.1 Software of the same version