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When you use the Disk Defragmenter tool to defragment your hard disk, you may receive the following message:
Drive's Contents Have Changed: Restarting...
This issue can occur if a program (such as an antivirus program or a screen saver) is running on the drive when the Disk Defragmenter tool is running.
To work around this issue, use one of the following methods.
Clean Boot the ComputerA "clean" boot is a method of reducing problems that may occur because of your computer's environment. Many problems that may occur when you run Windows or other programs can occur because there are conflicting drivers, terminate-and-stay-resident programs (TSRs), or other settings that load when you start your computer. Windows Millennium Edition (Me) and Windows 98 include a System Configuration Utility tool (Msconfig.exe) to make performing a clean boot easier. To clean boot your computer:
Use Safe ModeInstead of performing a clean boot, you may want to restart your computer in Safe mode, and then start the Disk Defragmenter tool. After you run Disk Defragmenter, restart your computer. To use Safe mode, restart your computer, press and hold down the CTRL key after your computer completes the Power On Self Test (POST), and then choose Safe Mode from the Startup menu.
For additional information about how to start your computer in Safe mode, click the article number below to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/180902/EN-US/ )How to Start a Windows 98-Based Computer in Safe Mode
For additional information about how to troubleshoot issues with Disk Defragmenter, click the article numbers below to view the articles in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/218160/EN-US/ )Disk Defragmenter Hangs After Choosing Disk to Defragment
(https://support.microsoft.com/kb/259030/EN-US/ )APC PowerChute Plus Causes Disk Defragmenter to Hang