First of all thanks to everyone for your considered and speedy responses. Just to complete the technical details Compaq Presario Desktop about 5 years old Windows XP Home edition Service pack 3 - Fully updated as of last week CPU Intel Pentium ®4 2.93GHz Disc Maxtor 6YO8O6O 72GB (50GB Free) just defragged 1.99 GB Ram (doubled from original) Video Card Intel R 82915G/GV/910GL Express chipset Display 1280 x 1024 @ 92 dpi I agree completely with the analysis that the video card/computer is not up to the job The main clue is that even when it runs the 6.0 version it is a little juddery on the transitions Altering the resolution to 800 x 600 doesn't help at all It looks as though the new super V7.5 is a step too far for my poor old computer! Just to put the matter in context I normally only use this computer for admin work and internet use I use it for downloading entries of AV's or digital images from Club members entering Club competitions because I can scan the USB stick with my virus software before downloading All my normal AV and photography work is done on my Dell computer which doesn't go on the internet!! This works fine with V7.5 and I am enjoying the new version very much As this problem was new to me and to V7.5 I thought I would ask and inform you what had happened Thank you all again for your help and guidance