You may find adding the free space to your E: partition a bit more troublesome than you envisage. The free space will be at the start of the drive according to the graphic and your C: partition is between the free space and your E: partition so from my experience with partitioing programs you may have to move the C: partition to the left in your graphic of the disk layout to enable expanding your E: partition - at least that is how it has worked using Acronis DiskDirector in the past. Windows Diskmanagement achieves this by converting to dynamic disks which has implications.
Not in this case try reading whole thread he already had a system partition so windows 7 dooes not make 100mb partion if a system partition is already present.
@ nipun.narang, glad you got it sorted out told you it didn't take very long. to be honest you could remove the dell diagnostic partition also ( just to avoid confusion when maybe reinstalling windows ) because you can download the application from dell site and you can add it to a cd if needed. That is up to you i just like to keep things tidy.
Yes, I did read it. And I ran the program as administrator the first time only. It didn't work. Anyway, I know I can still use the other options. I was just wondering about the partition only. Also, I read somewhere on google that after removing the dell diagnostic partition, something needs to be edited so that the "diagnostic" option does not appear in the menu when you press F12, otherwise the laptop won't boot. :\ Is that true?