Change RAW partition to NTFS or recover files from RAW

I've resized my C:\ partition but now I can't boot anymore. I tried to use CHKDSK to analyse the disk but keep getting this error:

CHKDSK does not support RAW disk.

I suppose the partition is damaged or changed to RAW format. So, how can I restore it to NTFS or at least recover my data?

Didn't need to recover my data and reinstall Windows. I've repaired the damaged partition unsing a recovery tool TestDisk.

1. Analyse hard disk and find the damaged partition;
2. Change it to primary partition;
3. Rewrite the partition table to register it again;
4. Reboot, Windows starts normally.

All these steps are explained here: Step_By_Step Wiki

Just in case this helps someone else in a slightly different scenario, chkdsk /F worked for me to make an unreadable "raw" partition a readable "NTFS" one, without loss of data. My scenario, in short, was that while the disk wasn't bootable, and Disk Management on another system would show it as "raw", chkdsk detected it as ntfs and repaired it:

• disk (500GB Windows 8 boot drive from neighbor's Dell Optiplex system) showed up as "raw" in Windows 10 Disk Management
• same disk - readable in MacOS 10.14 - i.e. could recover all files there
• convert /fs:ntfs said, "disk is already NTFS" or something like that
• chkdsk (w/o /F) said it was an NTFS partition and that there were a lot of file table errors

Copy of chkdsk output:

WARNING!  /F parameter not specified.
Running CHKDSK in read-only mode.
Read-only chkdsk found bad on-disk uppercase table - using system table.

Stage 1: Examining basic file system structure ...
  267088 file records processed.
File verification completed.
  1991 large file records processed.
  0 bad file records processed.

Stage 2: Examining file name linkage ...
  3541 reparse records processed.
  308192 index entries processed.
Index verification completed.
CHKDSK is scanning unindexed files for reconnect to their original directory.
  3541 reparse records processed.

Stage 3: Examining security descriptors ...
Security descriptor verification completed.
  20552 data files processed.
Errors detected in the uppercase file.
The master file table's (MFT) BITMAP attribute is incorrect.
The Volume Bitmap is incorrect.

Windows has checked the file system and found problems.
Run CHKDSK with the /F (fix) option to correct these.

Hope this helps someone else in the same situation.