have a look at:
How to troubleshoot the System Restore tool in Windows XP
http://support.micro...kb/302796/en-usFor additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
287505 How the System Restore utility uses drive letters
283073 How to disable the System Restore Configuration user interface
295050 Information on System Restore and password restoration
283252 Non-administrator user is unable to start System Restore utility
322246 You cannot create a restore point with a HighPoint Driver installed
299904 The System Restore utility may be suspended on a System Drive even though there is enough disk space
300044 How the System Restore tool handles hard-disk space usage
301224 System Restore "Restore Points" are missing or deleted
304449 How to start the System Restore tool from a command prompt in Windows XP
313853 System Restore tool displays a blank calendar in Windows XP
The System Restore Utility May Be Suspended on a System Drive Even Though There Is Enough Disk Space
http://support.micro....com/kb/299904/System Restore "restore points" are missing or deleted
http://support.micro....com/kb/301224/