thanks i totally forgot about event viewer.
here is the error description:
Event Type: Error
Event Source: Application Error
Event Category: None
Event ID: 1000
Date: 2/2/2008
Time: 3:23:44 PM
User: N/A
Computer: T9000
Description:
Faulting application explorer.exe, version 6.0.2900.2649, faulting module unknown, version 0.0.0.0, fault address 0x040cc16c.
For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 41 70 70 6c 69 63 61 74 Applicat
0008: 69 6f 6e 20 46 61 69 6c ion Fail
0010: 75 72 65 20 20 65 78 70 ure exp
0018: 6c 6f 72 65 72 2e 65 78 lorer.ex
0020: 65 20 36 2e 30 2e 32 39 e 6.0.29
0028: 30 30 2e 32 36 34 39 20 00.2649
0030: 69 6e 20 75 6e 6b 6e 6f in unkno
0038: 77 6e 20 30 2e 30 2e 30 wn 0.0.0
0040: 2e 30 20 61 74 20 6f 66 .0 at of
0048: 66 73 65 74 20 30 34 30 fset 040
0050: 63 63 31 36 63 0d 0a cc16c..
so i think is explorer.exe error...
I try to run sfc/scannow to repair the corrupted files , but it doesnt work ... the error code for sfc is: 0X000066bq[ The RPC server is unavailable]