Thanks for your reply.
Actually,yesterday I wanted to update my vpn client, so I uninstalled the old checkpoint VPN,maybe E60.. I cannot remember,at the same time, i installed the new E80.87, so, a series of problems appeared.
Now I find that I cannot install all vpn clients,E80.86,E80.87,E80.88 these 3 versions prompt a series of problems like this.
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another all previous versions (before E80.86), prompt
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My laptop have another vpn client but not in using,and before i uninstalled the old checkpoint vpn, they were all available.
Thanks for your recommendation. I will open a TAC case in this week.