It seems like you are facing an issue with setting up a disk defragmentation schedule on your HP desktop running Windows 7 Home Premium. Here are some steps you can take to troubleshoot and resolve this problem: 1. Check Drive Status: - Verify the status of your C drive to ensure it's not experiencing any issues that might be preventing it from defragmenting. 2. Check Disk Defragmenter Settings: - Open Disk Defragmenter and check the settings to ensure that the C drive is selected for defragmentation in the schedule. 3. Check Task Scheduler: - Verify the Task Scheduler settings to ensure that the correct drives are selected for defragmentation and that the schedule is set up correctly. 4. Manual Defragmentation...