Running out of Memory?

I've been getting running out of memory errors far too easily... at least it seems. Whenever I get up to about "75% physical Memory" according to task manager it says I need to close programs or risk losing information. Are you all running into these problems as well? I have 1.5gb ram 8gb ssd so I have pagefile turned off. Any suggestions for freeing up some ram? Any services to disable that can make a worthwhile difference? I don't remember ever getting an error with the lited xp version I was using even with 512mb of ram

 

are you using ewf?
because i get this errors too, when i doesn't use it for half an hour or an hour. when i get this error i look how much ram takes the ew-filter, an everytime it is around 800mb , but just restart and everything is oke ;-)

 

no but i am using a ramdisk for temp files... it does seem that I maybe getting a memory leak somehow related to standby? anyone else experiencing this