我装完STEP 7 V5.4 PROFESSIONAL的时候，跳出一个提示框：
You have deactived the windows firewall .
if you want to active the firewall later,you can only work with multiple computers using step 7 if the database server dbsrv7 is permitted as an exception ,do you want to enter it now?
这是提示是什么意思啊？？
选YES ,还是NO？？

我的系统是XP SP2的。