A registry file, or most would called it "Windows Registry" is a database that stores hardware, software settings and options of Microsoft Windows Operating System.
click on run in the start menu. type regedit there and enter. registry editor will open. there you can delete or alter a registry file.
Kernel is the most important file in the registry. Registry Cleaners is the best solution to clean registry.
because just deleting the file from the hard drive doesnt remove it from the registry. To do that you need to run a registry cleaner. I recommend ccleaner
This is a registry file kept in the registry and not in your documents. It contains personnel settings for each user. Leave this file alone.
The file "csrss.exe" can be deleted using basic registry cleaner software, such as Registry Mechanic. The file can also be removed manually but this is a laborious and potentially dangerous execution.
registry
If you mean a file with the extension *.reg, when you double click on it the operating system will ask you "Do you want to add information in the registry?" (or something like that). If you confirm you will change the registry. You have to be extremely careful when you are using such files because it can cause irreversible damage of the registry and as result the death of the operating system. If you mean SAM file. Then nothing will happen. The operating system will not allow you to modify the file. You cannot even copy it.
Use hivesys.inf file for presetting Registry keys
For backing up your Windows registry before using a registry cleaner, simple open Run, input "regedit", and your registry will pop up. Click "File", and select "Export", then you can backup your registry file to any location on your computer.But actually you don't have to do that. Most well-designed registry cleaner & optmizer has the function for automatic backup. That backup, is to backup the registry repair. If any problems happen after the registry change, then you can undo the change with the backup.
The purpose of the software "Registry First Aid" is to clean and fix registry errors on Windows computers. The software does an analysis of the registry and file system and will prompt the user for repairs to enhance speed.
Classes.dat
You file it in the same registry as the first mortgage.