|"i've look to it two days ago|
hour before the usage was 238 Mb
and now it is more than 292 Mb
approximately i have 1 hour left"
hour left until what?
292meg out of 2gig of memory is NOTHING. This is not a concern unless you have a rouge program running. Have you reviewed task manager processes?
Have you run
PS you can edit your posts to add information instead of continually posting a new piece of information.