My app can't start, what can I do?

da due giorni quando accendo il computer mi esce un allert con scritto : " impossibile avviare dropbox".

il messaggio di errore è questo:

bn.BUILD_KEY: Dropbox
bn.VERSION: 209.4.3661
bn.constants.WINDOWS_SHELL_EXT_VERSION: 76
bn.is_frozen: True
machine_id: 4c445718-8f34-48ac-b6f5-0f1fb18c565c
pid: 9856
cwd: 'C:\\Program Files (x86)\\Dropbox\\Client'
     real_path='C:\\Program Files (x86)\\Dropbox\\Client'
           	mode=0o40777	uid=0	gid=0
     parent	mode=0o40777	uid=0	gid=0
HOME: None
appdata: 'C:\\Users\\pierd\\AppData\\Local\\Dropbox\\instance1'
         real_path='C:\\Users\\pierd\\AppData\\Local\\Dropbox\\instance1'
               	mode=0o40777	uid=0	gid=0
         parent	mode=0o40777	uid=0	gid=0
dropbox_path: 'D:\\Dropbox'
              real_path='D:\\Dropbox'
                    	mode=0o40777	uid=0	gid=0
              parent	mode=0o40777	uid=0	gid=0
sys_executable: 'C:\\Program Files (x86)\\Dropbox\\Client\\Dropbox.exe'
                real_path='C:\\Program Files (x86)\\Dropbox\\Client\\Dropbox.exe'
                      	mode=0o100777	uid=0	gid=0
                parent	mode=0o40777	uid=0	gid=0
trace.__file__: 'C:\\Program Files (x86)\\Dropbox\\Client\\209.4.3661\\python-packages.zip\\dropbox\\client\\ui\\common\\boot_error.pyc'
                real_path='C:\\Program Files (x86)\\Dropbox\\Client\\209.4.3661\\python-packages.zip\\dropbox\\client\\ui\\common\\boot_error.pyc'
                      	not found
                parent	not found
TMP: C:\Users\pierd\AppData\Local\Temp
TEMP: C:\Users\pierd\AppData\Local\Temp
tempdir: 'C:\\Users\\pierd\\AppData\\Local\\Temp'
         real_path='C:\\Users\\pierd\\AppData\\Local\\Temp'
               	mode=0o40777	uid=0	gid=0
         parent	mode=0o40777	uid=0	gid=0
Traceback (most recent call last):
  File "desktop/dropbox/client/main.py", line 942, in wrapper
  File "desktop/dropbox/client/main.py", line 7075, in finish_dropbox_boot
  File "desktop/dropbox/client/message_queue.py", line 306, in _wrapped
  File "desktop/dropbox/client/main.py", line 6522, in _init_components_for_account
  File "desktop/dropbox/client/main.py", line 6443, in create_sync_engine
  File "desktop/dropbox/sync_engine_boundary/factory.py", line 212, in make_sync_engine
  File "desktop/dropbox/sync_engine/nucleus/classic_client/sync_engine.py", line 243, in __init__
  File "desktop/dropbox/sync_engine/nucleus/classic_client/modern_client/modern_client.py", line 294, in __init__
  File "desktop/dropbox/sync_engine/nucleus/classic_client/modern_client/base.py", line 243, in __init__
  File "desktop/dropbox/sync_engine/nucleus/classic_client/thin_adapter/in_proc.py", line 222, in __init__
  File "desktop/dropbox/sync_engine/nucleus/classic_client/thin_adapter/in_proc.py", line 546, in _init_new_engine_locked
  File "desktop/dropbox/sync_engine/nucleus/thin_client/client.py", line 149, in __init__
  File "desktop\extensions\nucleus\nucleus_python.pyx", line 77, in nucleus_python.NucleusSyncEngine.__cinit__
nucleus_python.SyncEngineError: "Initializing engine |>> Initializing filesystem |>> Failed to write root dot dropbox file |>> Opening .dropbox |>> openat_native |>> File corrupt or os encountered hardware error (0xc0000102)"

 cosa devo fare?????

premetto che non sono un' informatico di alto livello .

grazie a chi vorrà darmi una mano.

attendo i vostri suggerimenti