This article describes various file formats that use the 000 file extension and explains how to open each type.
How to Convert .CHK Files to Original Format
A file with the 000 file extension is most likely an Indexing Service data file used to store file locations so that the Windows operating system can perform file searches.
Another type of file that uses the 000 file extension is the Virtual CD ISO format. You will almost always see this next to a VC4 file.
The Trend Micro antivirus program also uses this extension for a format that stores patterns that can be used to identify new malware threats.
