Something certainly doesn't make sense. Fresh download from mirc.com/get.html .. you install, and you say you cannot conenct to any servers. You tried every server, to every network ? With the exact same errors about connecting ? Try /server irc.prison.net (they have no restrictions and should allow 'anyone' on)

2nd, you have a few people who you talked to who are having this same problem with no options menu. Hmmm After clean install, you run mIRC.exe. You still cannot click file/options ? No menu appears ?? Even before connecting to a server you have no options menu??

This group of a few people, who have this same problem... are you all 'friendly' with each other ? Share emails, files, sounds ? Or where did you find/meet these people with the this same problem ?