Try using a vm, or if your computer isn't powerful enough, a free shell host. Watch out though, many shell hosts run unix. I currently have an account at insomnia247.nl, which is a Debian server, although you need to get an invite code first. Join the #shells on the irc server (click the 'Chat' link on the homepage for a webchat) to ask for one. The owner usually responds quite quickly, but if they are away and you need to disconnect just say so, and check back later. The Insomnia247 irc server has a message scrollback, so unless there has been a lot of messages (which doesn't happen often) you should be able to see the owner's reply. Also, don't ignore bots if/when they reply, and follow any instructions in their messages. (A suprising number of people seem to be unable to read in a text based chat.)