The issue of slow performance assiciated with offline folders inVISTAconfirms what has been shared under "offline files (csc) + folder redirection = vista slow" in the forum. In summay, it seems Vista tries to sync all files all the time. Not just the files that have changed. I have downloaded and installed Process Explorer and confirmed that CSCService.exe is the culprit. It is simply a resources hog rendering the computer almost useless. I have tried to configure offline folders to sync only when the computer is idle and still did not fix the problem. CSCService keep consuming CPU time.Please help. This is a SERIOUS issue and have been reported repeatedly in other forums. I

Hi, Thank you for posting. Please try the following to narrow down the issue: 1. Scan your system to make sure that the system is virus free. Temporarily disable your security software (Anti-virus software, firewall, etc.) to see if this problem is gone. 2. If you have recently installed any software, hardware or drivers, please remove them. 3. Perform a Clean Boot to check the issue: How to troubleshoot a problem by performing a clean boot in Windows Vista http://support.microsoft.com/kb/9291355 Since you have found that CSCService.exe caused high CPU utilization, please check where the CSCService.exe locates. 4. Please try the hotfix: Changes to an offline file are not saved to the server when files are synchronized in Windows Vista http://support.microsoft.com/kb/935663 5. Re-initialize offline files cache How to re-initialize the offline files cache and database http://support.microsoft.com/kb/230738 If the issue persists, please run Process Explorer and collect some information for our further research: 1. Download the Process Explorer Process Explorer http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx 2.After downloading, extract ProcessExplorer.zip to the Desktop and run procexp.exe. 3.Click View and select Show Lower Pane. 4.Click View and click Lower Pane View - DLLs. 5.Navigate to CSCService.exe and highlight it. 6.Click File Save AS to save the process data of CSCService.exe on your desktop as a TXT file. 7.Please post contents of the TXT file to this thread. Hope this helps.Nicholas Li - MSFT