Hkey_Classes_Root
It is a process of deleting a files , Icons from startup menu and registry entry.
All configuration data about the computer including information about device drivers and devices used at startup is contained in the registry. Errors in the registry are often the cause of degraded computer performance.
The registry key that contains Plug and Play information about the hardware configuration used by the computer at startup is located at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum. This key stores details about all detected hardware devices, including their configuration and status. It is essential for the operating system to manage hardware resources effectively during the boot process.
system registry hive actually it is C:|Windows\system32\Config or HKEY_LOCAL_MACHINE\SYSTEM\Services.
I have visited a great website where we can download registry cleaner which will fix all registry errors. Now i have no runtime errors and startup problem.
Windows uses a database called the registry to keep information regarding hardware and software configuration information, user preferences, and application settings. // When 32-bit device drivers are installed, Windows records information about the drivers in the registry. // Every time Windows starts up, it reads the entries in the registry to know how to load the drivers needed at startup.
In Windows operating systems, the automatic startup location that is processed last is the "Startup" folder located in the user's Start Menu. Programs placed in this folder are launched after those specified in the registry and other startup locations. This means any applications in the Startup folder will execute after system-level processes have started, allowing for a more user-specific startup experience.
go to the start menu and type in msconfig into the run dialog box then go over to startup and uncheck the application u dont want to load.
If you don't want to waste your time on doing defragmentation, scandisk and other things, then download registry cleaner with best quality and it makes your PC up-to-date by solving registry errors, slow startup and shutdown problems.
regedit.exe /s path of .reg file
Antivirus Software is the best solution, registry repair software can repair registry and clean up the registry rubbish including missing shared DLL files, unused file extension, ActiveX and class files, application paths, redundant registry files, error messages, user action records, redundant DLL files, winzip open history, Winrar to open history, word open historical records, public documents, start menu, file type, system startup entries, uninstall the software item, software application paths, fonts, help file, etc. If not repair and cleaner registry after used the computer a long time, the registry will be bloated, and computer speed will be more slower. The following is ten free registry repair software reviews may be help you! you can reference Top 10 Best Registry Repair Software Reviews, http://www.bestexternalhdd.com/repair/top-10-best-registry-repair-software-reviews.html
This varies from operating system to operating system and application to application. Some of the places used to store configuration data are:preferences filesinitialization or startup script filesbattery backed up SRAM or NVROM (called PRAM in Macintosh computers)the Windows Registry in computers running Microsoft Windows