Windows virtual memory too low?

This error message came up about ten minutes ago. I read that if I right click on My Computer and click on Properties, then eventually go to Virtual Memory, I can put in the Initial size and Maximum size to fix the problem. But I don't know what numbers to put in. I really don't even know what the message means.... show more This error message came up about ten minutes ago. I read that if I right click on My Computer and click on Properties, then eventually go to Virtual Memory, I can put in the Initial size and Maximum size to fix the problem. But I don't know what numbers to put in. I really don't even know what the message means.

If this helps it says:

Total paging file size for all drives:

Minimum allowed: 2 MB
Recommended: 751 MB
Currently allocated: 844 MB

Oh and it's a Toshiba Satellite a105 s4054 and I have Windows XP.
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