Thanks Yoga
I tried what it said on that link, but same error message came up.
I am using Windows XP Service pack 2 & Internet Explorer 7. I tried to download Skype Version 3.5.. Any more help.
Maybe try downloading it using a different browser such as Firefox. If it works there then you may need to start scanning your PC for nasties in case Windows or IE is infected somehow (see the "clean PC" sticky thread at the top of this forum).
Thanks folks. Got that sorted. Deleted old Skype files & deleted temp internet files. Downloaded new Skype version with Internet Explorer. Working ok now.