What are the reasons for the decrease in disk space after VISTA defragmentation

Try to clear the system junk first, antivirus. Also, do you defragment very diligently? This will lead to the loss of space, defragmentation is to speed up the speed of track finding, do not need to organize very diligently, delete unused software, clean up system restore points, use Windows comes with disk cleanup or Super Rabbit, optimization master, etc. to scan, do not rule out the possibility of poisoning.

Vista and Win7 will back up the defective file sectors to a hidden folder when the disk is deorganized! I forgot what it was called. Fix that disk, or delete it in PE.

This is normal, nothing, this system is like that, as long as it's not surprisingly much, ignore it.

A few days ago, as soon as I tidied up, there was a loss of six gigabytes of space, and I was so angry that I installed a computer.

I never tidy up, every day BT, electric donkey, and I don't feel **abnormal.

Defragmenting your computer's disk does not change the available space. It is to improve the overall performance and speed of your computer.

After computer disk defragmentation, the fragmentation and messy files generated by the computer disk during long-term use can improve the overall performance and running speed of the computer.

Because files are dispersed and stored in different places throughout the disk, rather than being stored in successive clusters of disks. File fragmentation generally does not cause problems in the system, but too many file fragments will cause the system to look back and forth when reading files, causing system performance degradation and serious shortening of hard disk life.

Disk defragmentation is to consolidate the fragmented free space into one piece, into a large free space, in addition to cleaning up useless files and the like, in general, the space will become larger after disk defragmentation.

The files on the hard disk are saved by clusters, and when storing, the system will write to which cluster when it retrieves which cluster is free, and find another cluster to write when the storage is not available, so the files are not necessarily stored sequentially on the hard disk. Defragmentation simply reorganizes the data of these clusters stored in different locations so that they are stored sequentially and continuously, so that the size of the space is not affected.

1. Use disk cleaning software to clean up the C drive, which can free up about 50M-800M space for the C drive.

2. Turn off the sleep function, enter the powercfg -h off command in the start menu to turn off hibernation, the actual size of this file is the same as the physical memory, which can free up 1-3G space for the C disk.

3. Set up virtual memory: Computer Properties > Advanced System Settings > Settings (Performance) > >Advanced Tab" Change (Virtual Memory), set the C disk to no paging file, and then set the D disk to the size of the system management, after the change, only press the "Settings" button to take effect, and finally restart to complete the setting, this file defaults to the times of the physical memory, which can release about 2-4G space for the C disk.

4. Click "Clean Trash" on the main interface of PC Manager, confirm that the relevant garbage type is checked, click "Start Scan", and then click "Clean Now", if there is any garbage that needs to be confirmed to clean up, you will confirm it and then carry out a deep cleanup to achieve a quick and safe cleanup of junk files in the computer.

Install some unimportant programs on the D drive.

1. "Defragment disk" for all mechanical hard disks (SSDs are not required), this operation is not to increase the free space of the disk, and the function of "disk compression" can moderately increase the disk space;

Defragmentation is an effective way to improve the head seek efficiency of hard disk and increase the disk read speed.

In computer use, when writing files to the hard disk, the head rotates with the hard disk platter, moving from the inside to the outside on the disk, and then from the outside to the inside, the process is the same as watching an old record player in the twenties and thirties in a TV. When we want to write files to the disk, where the head runs, and finds that the place is blank, we write files to this position, run a section and find that there is a file, stop writing, and then run to a blank area, and write the unfinished file in the new place again.

When we look at the operating system, each file seems to be independent, but in fact, on the hard disk, many files are divided into many small pieces. Later, when you want to retrieve this file again, the head has to adjust a little here and there. It's going to be slow.

So we have to do a disk defragmentation, after the organization, the original file is put in a fixed area, the file is "continuous", and the reading is faster.

That's what it does!

That's when the system turns on regular defragmentation, click "Delete Settings" and pop up the following window.

The "Enable Plan" inside is before "Configure Plan", and the following window pops up after clicking.

Remove the checkmark in front of "Run on schedule" and you're ready to defragment manually.

In Windows, users can select "Programs Accessories System Tools Disk Defragmenter" from the "Start" menu, pop up the Select Drive window, select the partition you want to decongrate, and then click [OK] to start defragmenting, but this method defragmentation process is very time-consuming, generally a partition of about 2GB takes more than 1 hour, so it is recommended:

1. When defragmenting the disk, close all other applications, including screen savers, and it is best to set the size of the virtual memory to a fixed value. Do not read or write to the disk, as the disk defragment will start organizing again if it finds that the files on the disk have changed.

2. The frequency of defragmenting the disk should be controlled appropriately, and too frequent defragmentation will also shorten the life of the disk. Disk partitions that are frequently read and written are generally organized once a week.

Hard disks are like houses that need to be defragmented more often, and to organize disks you need to use the "Disk Defragmenter", which can defragment volumes formatted using the File Allocation Table (FAT) file system, FAT32 file system, and NTFS file system. Disk defragmentation is actually the process of rewriting files on the hard disk to maintain the continuity of the files.

It is recommended to defragment the disk once or twice a month at most to keep the read and write speed of the hard disk in the best condition.

In response to your question, I think so, a single large file will be automatically concentrated into a continuous sector, for all large files will not be all centralized, but relatively scattered and concentrated, after finishing with the human eye, the original partition file location does not change in any way, is an effective means to improve the speed of the computer.

In fact, there is no need to delve into these problems, the system will only compress some fragmented files and store them in other places, and there is no change to other parts of the system.