In this case I would check how much memory your browser uses for it's cache.

>Sergey,
>
>>It sounds like the Windows page swap file. If you have a free space on the D drive you can move it there.
>
>Turns out that, using Windows default, the swap file is already (and always was) on Drive D, as far as I can tell, (Norton's Speed Disk reports it that way, anyway).
>
< SNIP >