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You won't believe how long I've been trying to download the malware and I'm not sure now if it's actually done. Can't see it on the desktop. Will do the piriform c/cleaner. I do my own every so often. Regarding the IE firewall, have been thru the computer and cannot find it anywhere so I assume it was over-ridden by the Trend security, which is not a free one. I think my next move will be HP - I always find them quite good.
Many thanks for your help and still open to any other suggestions, I hate being beaten!