my system is showing the event id 55 problem it shows me the error The File system structure on the disk is corrupt and unusable. Please run the chkdsk utility pm the Voulme Expansion Drive we are using the windows 2003 enterprise R2 Editions psl provide me the patches if available

It means there is a good chance that your hard disk is going down hard, permanently. First, backup all your data to reliable storage, like a flash drive or a DVD or something. To determine the each driver's physical device name, you can use Sysinternals WinObj: WinObj v2.15 http://technet.microsoft.com/en-us/sysinternals/bb896657.aspx 1. Expand the node \--->GLOBAL?? 2. In the right panel, you can verify the physical device name of each drive letter such as C:, D: About the Event ID 55, please run CHKDSK command on the disk that contains the corrupted file. There is a known issue that Event ID 55 will be recoreded while saving a file that has a DBCS file name Windows Server 2003. Please make sure that the latest service pack is installed on the system. There is a known issue that some Antivirus software may cause this issue, you may perform the clean boot on the client that has this issue to narrow down the issue. a) Type msconfig in the command prompt and press Enter b) Click Services tab and select Hide All Microsoft Services and Disable All third party Services. c) Click Startup tab and Disable All startup items d) Click OK and choose Restart e) After reboot, check whether the Event ID 55 persists. For your reference: 885871 You may receive an error message when you revise and then save a file that has a DBCS file name in Windows Server 2003 or in Windows 2000 http://support.microsoft.com/kb/885871