Klik na Plochu - pak pravé tl. myši na ikonu:

Start - Hledat - cmd - spustit jako správce a pak tam napsat, co ti radili a odentrovat. Pravděpodobně ti to vyhodí hlášku s nabídkou, že se to provede po restartu PC (Y/N).

C:\Windows\system32>chkdsk c: /c /f nebo chkdsk c: /scan

C:\Windows\system32>chkdsk /scan
The type of the file system is NTFS.

Stage 1: Examining basic file system structure ...
  77824 file records processed.
File verification completed.
  854 large file records processed.
  0 bad file records processed.

Stage 2: Examining file name linkage ...
  113204 index entries processed.
Index verification completed.
  0 unindexed files scanned.
  0 unindexed files recovered.

Stage 3: Examining security descriptors ...
Security descriptor verification completed.
  17691 data files processed.
CHKDSK is verifying Usn Journal...
  37260720 USN bytes processed.

Usn Journal verification completed.

Windows has scanned the file system and found no problems.
No further action is required.

  41940991 KB total disk space.
   8696220 KB in 59139 files.
     45876 KB in 17692 indexes.
         0 KB in bad sectors.
    181735 KB in use by the system.
     65536 KB occupied by the log file.
  33017160 KB available on disk.

      4096 bytes in each allocation unit.
  10485247 total allocation units on disk.
   8254290 allocation units available on disk.