@Saito S

Form the drive images you linked to above it is clear that your drives are way over capacity.

Very good rule of thumb.

Limit your disk drive usage to 50% of the logical and physical drives with at least 50% free space. Though some will say that you only need 10% - 15% of free space my experience has been 50% is a safe number. You appear to have about 15% - 20% free, but my personal experience is that at that percentage of free disk space you are going to have some major slow downs in a number of disk intensive programs especially if the C: drive is below 20% which yours appears to be.

Also, if you are using Windows Backup and Restore to backup up the Windows Systems Image you might want to check how much disk space these files are taking. They could be taking up a lot of unnecessary space if you have a lot of them on your hard drive. They could also be defragmented which will make it more difficult to defgrag the rest of your hard drive if you do not have a lot of free space on that drive.