Thanks! a lot people for all ur valuable suggestions dunno Y but the problem is solved on its own he booted ... the system in Last Good Known Configuration ..&

it's working fine now ... & thx! Swatcat for reming me abt this: [Quote] change the
size....do not forget to click Set after making changes..[/Quote/] ...
I forgot to do this ..when i logged in his computer in safe mode .... I think tht's only Y his problem was not solving!! & thx! alib_i for ur suggestion instead i forgot to click on "set".. but i think the file wasn't corrupted ..but tell me does this really happen a file corruption tht U mentioned in future i'll take care of this too thx! yaar .. & Allwyn as always .. thx! yaar !!