Stuck in a loophole; Locked myself out of C:\

While configuring user accounts permissions and noticing that there were 4 different kinds of users, one being the administrator user and another being me, i deleted all user accounts bar the two stated, now my main windows partition containing the OS is labeled as 0 bytes and i'm no longer granted access to anything in the partition itself, however i can view the files if i go indirectly to a shortcuts file location.

I've tried going through properties>security>advanced>owner>exit>clicking my username>check replace owner on sub containers and objects >apply but doing so only provokes more "You are not permitted to perform these actions" pop-ups.

I really do not know what to do, i'm the only user of this computer thus the only user account, and an administrator account at that, such is why i deleted the extra users i saw listed, although now i wish i didn't try to fix what wasn't broken.

Is there anybody who can help me? My windows partition is a 30gb part on a 750gig, the rest is another partition which i can access as normal, aswell as programs on a second 500gig HDD that work perfectly fine, but anything on the C:/ drive will not load, for example system restore will not permit me to load it, and CMD is being very picky with what i can and cannot do with it.

Can anybody please help me?

Authenticated Users
SYSTEM
Administrators(NEVADA-PC\Administrators)
Users(NEVADA-PC\Users)

These were the original four, but i cannot remember correctly,

I deleted the first two and now administrators and users remain.

This was not under Windows 7's default user account creation window, I deleted them under the list from the properties> security on the c:/ drive

When i set CMD to run as administrator i get the Network Error:

"Windows cannot access C\Windows\System32\cmd.exe"
Error code: 0x800704b3

If i click "Diagnose" I get another error "There was a problem troubleshooting"

Typing in sfc /scannow prompts cmd to write "You must be running an administrator console session in order to use the sfc utility".

Considering that i only have one account set as the administrator account I would not have assumed 4 different variants of the same account with varied policies would be necessary, If I'm the only user of this computer then i don't require an extra profile that has exactly the same permissions as the admin account, at least that is what i would naturally expect.

I really don't want to have to format my OS partition, Would it be possable to create another administrator account and through that grant my current "broken" account full control? Or am i just talking wishful thinking.

Also, i still get the same error message using your method.

Is there no other alternative?

I am grateful for you trying to help regardless.