Change partition size on my C drive

Registration date
Thursday April 9, 2009
Last seen
April 23, 2009
 Dawg -

i have an hp pavilion laptop that im having some trouble with, long story short, I reinstalled the os after messing with the settings a little bit, and now my C drive says that it is only 35 gigs instead of 320.... can anyone help me change the size of the partition back to the full 320?

HP Pavilion dc6871us laptop

(ive been reading and think I might be able to do this with a reinstall cd... I dont have a copy of an actual windows disc, but I have an upgrade disc and a dell reinstall disc... can I use either one of those cd's to reformat the hard drive?)

4 replies

Registration date
Saturday May 23, 2009
Last seen
October 20, 2010
go into storage management and check if hdd is seen by system to its full capacity. you can then add a partition to the remaining space. this will give you 2 partitions, one of 35 gb and the other one with the remaining size. you can then format that partition.

saves on having to reload your system.
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if you have vista or later, right click "my computer" and click on "manage".

when the window loads up you should see an options bar on the left hand side and an option called "disk management" click this option and wait for the window to load

now you should see what partitions you have (the 35GB and remainder)

right click the 35GB partition and click "extend volume", this should tell you what unallocated space you have and on what HD the unallocated space is on.

for example there should be a column on the left hand side saying "disk 1 XXXXGB free" (or summin like that) and a column on the left, with options in the middle.

i cannot remember the exact options in the middle but basically you want all the unallocated space to go into the column on the right, this right hand column is the space the original volume is expanding into (if this isn't clear, sorry but im trying to describe it as best I can)

anyway once you use the options in the middle to get the free space into the right hand column click next and follow the on screen instructions if your not already

(PLEASE NOTE) it WILL take a while to expand the volume and its important you just let the computer do its thing, it may appear asif it has frozen, but it has not (trust me it takes a while i've done it before) it may help if you close all background programs and windows (bottom right .... right click ... quit/exit/stop, whatever the case maybe, if its something like anti-virus software don't worry because it might be more hassle starting it again afterwards)

hope this helps


As sharpman said, you'd better check in Disk Management first, if the residual space is unallocated, you can easily create another partition in disk management. But if there is only 35GB totally, there must be hidden partition and you need to use the hard drive tool providing by the manufacturer to solve the problem.
Yes! just select extend and go on pressing next till you get the finish prompt..the unallocated space will be added to the corresponding drive instantly!