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This is a problem that I have had since purchasing my computer 4? years ago (Dell /Windows ME). Both Scan Disk and Defrag will start and then restart - up to 10 times at which time they stop. An error message indicates then that changes have been made to the disk, necesitating a restart. The restart occurs about every 1 minute. On rare occasion will the procedure continue without problems. I took it in for service once and was told they had no problems. No other programs are operating during the runs. What could be interfering?

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