thanks, i just wanted to upgrade as i was getting virus message (and that i had reported some time back-but was told it is virus free). But now it seems one more file - virus free is available for download. will try to install the same.
thank you once again for the suggestions.

forgot to add - other computer i am not loggen on with limited account- though i am new to windows xp - i am using administation/supervisor equivalent status. is there anything to be done in xp setting?

also what about stability of 4.05 or some newer version. does it offer to change brighness/contrast?