I got this error “Class not registered” when I try to see images under my desktop.
This message has many aspects of origin which led me to use a utility for checking and removing the backdoors.
First you need to read about this tool: Norton Power Eraser uses our most aggressive scanning technology to eliminate threats that traditional virus scanning doesn’t always detect, so you can get your PC back. Because Norton Power Eraser is an aggressive virus removal tool, it may mark a legitimate program for removal. However, you can always undo the results of a scan. It can also help detect and remove Potentially Unwanted Programs.
The tool can be found here.
Just download and run this tool.
By default, Norton Power Eraser performs a Rootkit scan and requires a system restart.
Also this tool come with this features :
Norton Power Eraser advanced scan options
Norton Power Eraser provides scan options for advanced users and technicians to perform advanced troubleshooting. Following advanced scan options are available in Norton Power Eraser:
Now, you can scan specific files and folders using Norton Power Eraser. Norton Power Eraser uses the Reputation Scan to speed up the scan. Currently, only the files with following extensions are supported for scanning:
Perform a standard Norton Power Eraser scan on your current Windows OS. This scan does not include Rootkit scan.
Multi Boot Scan:
Perform a scan on specific OS in a multi-boot Windows environment. You can select the Windows OS that you want to scan. Multi-boot Scan option is not available if only the current OS is detected.