Hi, thanks for replies. Everything is fine in that I can access all files etc. In fact it was originally the c drive but had a disaster and as I had no backups I had to put in a new hd as c: I take photos for a living so create folders in a weekly order, then when I get re-orders I used to drag and drop from old folder to new. Having a hectic time at moment so not on pc all the time and just noticed the glitch yesterday. I had to re-load all software to new hd and wonder if drag and drop could be affected by windows activation??I have 2 pcs so will go on the one that does not drag and drop later. I switched it off so that may fix it.