simple and safe way to increase system drive size partition?

rozroz said:

that's what i did before, and now it shows the round mouse logo for a long time with no change, and i can't do anything else on the disk management window..

can you delete d?

DELETE A PARTITION

1. Open Computer Management by clicking the Start button ,
   
2. clicking Control Panel,
   
3. clicking System and Maintenance,
   
4. clicking Administrative Tools,
   
5. and then double-clicking Computer Management.* ( If you are prompted for an administrator password or confirmation, type the password or provide confirmation.)
   
6. In the Navigation pane, under Storage, click Disk Management.
   
7. Right-click the volume, such as a partition or logical drive, that you want to delete, and then click Delete Volume.
   
8. Click Yes to delete the volume.

rozroz said:

oh, i didn't know i HAVE to delete whole D for that
i thought there are ways of taking free partition space and redistribute it

you can only alter to the right of the disc main partition and max of 4 partitions to a disc

have you done it deleted it?

Hello you may like to try Partition Wizard. It can do things that managment has trouble with. Have a look at this link. Good luck to you
Partition Wizard Bootable CD allows user to boot computer directly to manage partition.

How to Extend a Partition or Volume in Windows 7 brinks turtorial Partition or Volume - Extend

when you have added the unallocated disc space to the c then you can make a partition to your choice of size are you ok with this?

i have to go out i hope you can do it ok brinks tutorial link i posted explains it for you best of luck :)