how to partition hard disk  

hello i am a new member.i have sony vaio laptop.i though to partition hard disk.it had 500gb memory.but the problem is when i did partition by disk management. it aloowed me only to partition 226 gb space.so now in my e drive there is 226 gb n in c drive 227gb space.actually i want to keep in c drive 100 gb.and make another drive of 100gb but whenever i try to shrink it doesnot allow to extend.i tried partition software.it did the software booted and my laptop kept on showing boot manager missing.and i again made it by taking whole day.i am really confused about what to do.i am afraid to use partition software because it may again boot my laptop and cause me again the same problem while using disk management. it does not allow to shrink.plz help....

Normally when you edit partitions on your disks it formats them. I hope you have a copy of your OS handy.

It sounds like you wiped your hdd(s) because you were messing around with the partitions.

My opinion: Use your OS install disk to edit the partitions how you would like & reinstall.

I realize you were at a point where it wasn't booting, but later in your post your comments made me think you've got it booting again.

If it does boot into Windows, post a screenshot of Disk Management, with the window maximized and columns/panes adjusted to show max info. And please explain one more time exactly what kind of partitioning you want to end up with.

If you're not able to boot, this may be of help: Repair Install