"LCI server problem"
This is not a server problem, this is probably problem created by admin in order to the keep page ranking of LCI high in Search Engine results by keeping non legal content in "control", on individual accounts otherwise everybody would be facing the same problem.
"your internet service provider problem"
Niether is this ISP problem. Even if the ISP is running a Cache Server, how does a Cache Server know that it has to dish out a "flood control" webpage in response to http response of your browser unless the browser is making a http request for the " flodd control" page? My ISP is BSNL and it does not have Cache Server, I have ensured that temp files are absent in my browser(Firefox), ensured OS is slim and trim, in top shape, fully hardened, no virus, spyware etc., I am also recieving this message.
Run CCleaner analyse and run cleaner. Thereafter click registry and scan for registry issue and fix that issue .
No harm in doing this, at the most it will make the system a little light. Moreover useless programs running at startup can be disabled or simply removed either from CCleaner or msconfig.
Defrag your harddrive using windows defrag or download free programe called Auslogics Disk Defrag.
It is certainly going to speed up the hard disk data read/write time but will not solve the problem of getting "flood control" page. I find MyDefrag(https://www.mydefrag.com/ ) better than Auslogic Disk Defrag.
Scan your Pc with good antivirus .i currently use Kaspersky its a good antivirus. Use another browser like chrome or mozilla or internet explorer new version 8 or 9(9 ver.only support vista and 7),or opera browser.
It is always good to scan your PC and use some anti virus unless you know how to harden your PC(especially Windows) in order to make it virus/hack resisitant. In my opinion Firefox is better than Google Chrome because Google Chrome does not install itself in directory named "Program Files" in Windows but installs itself in the home directory of the user logged in. Because of this if the user level permissions are compromised by any virus/spyware, it will even get privileges to make changes to the files of browser.
Yes I agree there is a work around to this problem, but if workaround is discussed here, the digestive system of some people is surely bound to fail.