Unallocated disk space

try: http://gparted.sourceforge.net/

Well, usually it's not 7GB bot more 700MB.  It's the WinXP that is doing that.  I guess it's more a question of space calculation versus partition size calculation that gives a difference because of the way it is calculated.

Anyway, if you want to resize partitions to use full size of the disk, you could use Paragon Partition Manager or any other partitionning tools.  It's easy to find and it will do a good job anyway!

If you don't mind creating another partition you can do it like this.

In Control Panel open "Administrative Tools".  Now open "Computer Management".

Select "Disk Management".  Right click the unpartioned space and select "Format".  

The image I attached has "Format" greyed out because I have no empty space on my drive; but it shows what you need to click on to format a new partition.
compmangment.jpg

Not going for the "answer" above... just another option... because you want to simply add the extra space to your c drive.

Agree with MaxterJF.  Paragon Partition Manager is the way to go.  PPM and other Paragon products are given away free about twice a month at Giveaway of the Day:

http://www.giveawayoftheday.com/

Can you take screen shot of Windows Disk Management and post it here? I am curious to see what unformatted space block have you found there.

Sorry Guyz, None of the above options have actually given  me the opton to MERGE my disk space...

Could you still post the screen shot I requested in my comment?

HI, Please find the attached Screenshot as requested. I just want the space in other drives merged to my C drive. Can you please help me on this ?

Thanks

Screenshot.bmp

You do not have unallocated space other than that 322MB (nit 7GB).
I think your tool that originally discovered 7GB considered the protected Recovery partition to be unallocated space. Or it was not able to detect the partition ID of first partition correctly thus reported it as unallocated.
Did you format the drive completely or only system partition space? As you see you have two recovery partitions on the drive 8GB and 2GB. Is this some vendor PC? Dell? HP? They put there usually recovery environment so you could press some F key and start restore to default installation your Windows.

HI Mine is sony viao....I just want the space in other drives merged to my C drive. Can you please help me on this ?

So I assume you do not need the recovery feature of Sony, am I right?
If yes then you need to edit Boot.ini file of XP, then get a copy of partitioning tool such as Paragon Partition Manager 11 www.partition-manager.com (paid) or free one like Parted Magic 10 (works from CD only).
With the help of partition manager you can delete bot Recovery partitions and allocate the space to C: drive.
Since then it will boot into bigger C: drive.

HI , can you please let me know where i can get the free one like Parted Magic 10 ?