You need to give a better explanation of your problem other than URL is
invalid. What application/software, Web site or all Web sites and what error
code/message is being reported, other than, you posting URL is invalid?
If English is not your native language, you may also choose to post in
one of the newsgroups in that language. This is said not to offend but
to help you get the answers you need. You will still need to include
details per the links above. Here is a list of all the MS newsgroups so
you can find your language: