I'm trying to defrag my Windows Vista Home premium 32bit machine. I can't seem to complete the defrag process because the os is stating I need to have 15% of free disk space. I notice that there is a file C:\ProgramData\Microsoft\Search\Data\Applications\Windows\Windows.edb and it's just under 1 GB. I'm wondering if it's safe to either delete it or move it to another drive and then move it back after the defrag process.
Also, is there a way where I can search for files or folders in a drive and find out which files or folders are taking up the most hard drive space?