Symantec Endpoint Protection shows every client 'offline'

Dear all.,
a.)we used Symantec to protect our PC. and always I checked PC status on management endpoint.
and one day i find every one shows "offline",but actually i'm sure they are active.
how to deal it?
b.)i think C driver is full.but how can i clean it?
Pu YuAsked:
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Shaun VermaakTechnical SpecialistCommented:
You sure clients can access the server? Is server firewall allowing connections?
Pu YuAuthor Commented:
Yes ,
Because about 2 weeks ago , I also received the e-mail, shows online....
Shaun VermaakTechnical SpecialistCommented:
To get info on used space, use WinDirStat as SYSTEM

You can use CircularLogArchiver to archive old data

Please post a screenshot of WinDirStat

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Pu YuAuthor Commented:
Thank you very much.

this is our FT service and  i can not install software on here

i will try another way to solve

thanks and best wishes
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