The Gradient tool in LR on my desktop is so slow that it's almost unusable. Fine on my laptop though - go figure.
It takes several seconds to paste in and then does so very, very slowly. I try not to go too fast so it can keep up but it seems to make no difference. If I go to make any adjustments for exposure, saturation, angle etc., I could go get a cup of coffee while I wait for it to take effect. In short, the time lag is so bad, it's virtually unusable. If I go back in History to have a look see, it takes about a minute for me to see the change. The Brush is a little slow, but nowhere near this bad. All other functions are fine.
I'm running XP with 4 gigs of RAM and a Dual Core Pentium, and have an empty external HD for a scratch disk. I've defragged, run checkdisk, clerared out all unecessary crap, optimized LR etc., all to no avail. I uninstalled LR and then reinstalled and it's still the same. Anyone have any ideas? Thanks.