Problem in creating new partition or Volume in windows

[atedisons]

In my dell studio 1555 I inadvertently delete some registry files so through PC restore I have reinstall win 7 Home Premium .

I have got the problem in creating new Volume.

Before PC restore process I have already made 142 GB as "Free Space" and 146 GB in C:/ Drive of 320GB SATA HD.

Now the OS is in 146 GB partition.I made a shrink, to have 80 GB in C:/ Drive .

As a result an unallocated partition 66GB is formed between Drive(C) and Free space.

I tried to create a new simple volume out of 66GB, but after clicking Finish button at the end it shows
"You cannot create a new volume in this unallocated space because the disk already contains the maximum number of partitions".

After this surprisingly I have created two Logical partitions(50 GB & 52 GB) from the Free space leaving 40 GB.

Please help me how to create a primary partition out of unallocated 66.42 GB partition.

My disk Management show (as in order)
Healthy(OEM)-198 MB,
Recovery-9.12 GB,
OS(C)-80 GB,
unallocated-66.42 GB,
Drive(G)-50 GB,
Drive(H)-52GB,
Free space-40GB.

My system detailsell studio 1555,windows 7 Home Premium 64 bit,core 2 duo T6600,320 GB SATA HD,3GB RAM.

 

[oldtraveler]

You may have more luck using this. I did. It's more powerful.
http://www.partitionwizard.com/

 

[whs]

There are three types of partitions: primary partitions, extended partitions and logical drives. A disk may contain up to four primary partitions (only one of which can be active), or three primary partitions and one extended partition. In the extended partition, the user can create logical drives (i.e. "simulate" several smaller-sized hard drives).

Reference:
http://social.answers.microsoft.com/Forums/en-US/w7performance/thread/6d938215-a398-4d13-8d34-662e4dddf8ce

 

[SIW2]

If you post a screenshot, we will be able to advise the precise steps.

It is likely the best free app. for this job is: Paragon Partition Manager 10 Free