Thank you for all the info good people.

I think I am going to go with a format C: and reinstall just to be on the safe side.

Goodness knows what could have been done by me running a malicious .exe on my machine.

Serious stupidity on my part but very cleverly implemented by the hackers, they really tricked me good but have to say, I'm astounded Electrum left themselves open to this type of vulnerability. I mean the hackers actually manage to block initial outgoing transactions in order to fool you into thinking you need an update.

Bastards.

Hi All,

So I fell foul to the Electrum phishing scam (it had been awhile since i used it and I'm not on form atm,, don't say it  ) and downloaded and installed "version 4.0.0", and to no surprise within a jiffy lost about £100 in btc (all that was in the wallet) when trying to send it.
I've come to terms with my stupidity now and have consigned that wallet to the grave. I have removed Electrum from my laptop (Add/Removed programs) and deleted all files with electrum in the name I can find to try and be sure. I've run a Bitdefender scan of the whole computer which has turned up nothing, but I still feel a little worried I might have left something nasty on my machine.
I'm also a bit nervous about installing and setting up a new Electrum wallet (from the correct .org site!) just because like anyone I don't want to chuck my money away.

Any advise would be welcome.

Thanks