"Could not use the magic wand because there is not enough memory (RAM)"

"Could not use the paint bucket because there is not enough memory (RAM)"

"Could not use the brush tool because there is not enough memory (RAM)"

"Could not complete your request because of a program error"

Hi there,

Been having lots of problems with Photoshop recently, having uninstalled / reinstalled 7.0 and CS a few times (doesn't matter which one works at this stage) but still not had any luck.

It had been working perfectly for months with no issues and i cant think of anything that has changed in the meantime to effect it. I have installed Adobe Type Manager Light just in case it was something related to that but no change.

Can anyone help?

OS: Win XP
RAM: 3 Gig
Photoshop: CS (or 7 which i had installed, but )