Hi ozzieann, I'm rather confused about this one because it seems to me to be a composite of 3 things, so just to keep the thread alive I'll make some comments that may - or may not - be useful.
WinRARis a file compression / decompression utility (a bit like WinZip) click here. This utility is available as a 40 day trial download, but after that time it costs $40. If you have this software installed, it could be that there is only 2 days left before it is deactivated.
BT Voyager is an ADSL modem. I wonder if you use AOL as an ISP, use a BT Voyager modem, and in installing it, used the trial version of WinRAR to decompress some vital files.