[pmrid (Peter)]

I recently had a Trojan I couldn't remove so I did a full restore on my computer followed by the tedious process of reloading and re-activating various pieces of software. That included my Photoshop CS5. I've been using this version for about the last year without a glitch but now, I'm in all sorts of confusion.

The iussue is doing standard Colourizing of LRGB and NB images. Previously, I was able to do this easily and without a glitch but now, PS won't blend the layers at all. As I colourize each successive layer (Screen mode as usual), whatever colour I assign (120 or 240 for example) becomes an opaque layer over the top of the whole image and the underlying layers don't show through at all, so I end up every time with just a blue image.

With LRGB images, I have had some success using the "Merge Layers" option in the Channels dialogue but not if I try the more usual and flexible route of doing a Hue/Saturation adjustment layer for each color.

Can anyone suggest what may be going on here?

Peter