I was surfing comfortably at this site and others, then my computer suddenly halted and when I reset my machine, to my amazement MB Ram dropped from 256 to 224 MB! Always when I started the computer (for the last three years) I got 262,000 MB Ram, now I only see 229,000 MB Ram. Is there something wrong with my Ram? Is there a way to fix it?

I can see that it's affecting my system. Any solutions to fix this problem will be greatly appreciated.

Thx in advance