I have been able to access the icloud site by connecting to the icloud.com site. Recently, i have not been able to connect. I get connection errors. Has anything changed?

I have been able to log in to my icloud account simply by connecting to the icloud.com web site. Recently, I am unable to connect and get connection errors. has anything changed?

I can't install icoud on my work PC, without an administrator, but was able to connect in the past.

I am running a windows 7 PC