I have been getting this schannel code 36887 fatal code 40 in the windows in event viewer and with windows freezing for a few seconds to a minute and then clears up and started more often. I have read a problem is caused by the faulty nov14 update kb2992611 to fix a Schannel security hole. It puts incorrect cyphers into windows. I just downloaded kb 3018238 from Microsoft and installed it. This update said it is only for windows server . and will remove those ciphers. I have windows 7 and it did it install without error . I only got one error but still testing it. If this kb3018238 does not fix problem will uninstalling this KB299611 fix the issue. Is it safe to go without security update. Don't understand how this kb3018238 installed I if it not for windows 7 .