Windows 7: slow opening folders and files

when I open folders and files the system have a lag (0,5 - 1 second) this happens in my two HD and in any file and folder (has many or no file)

I try:
- Disable index
- cleanup HD
- disable effects
- disable kaspersky
- change folders options
- check disk
- defrag disk

This is more than a shot in the dark.

Disable WinRAR shell integration.

Failing that, use ShellExView to locate other candidates.

shellexview don`t work in my system, items aren't disabled.

What?

The tool is most useful TO disable items.

Allow me to start fresh.

A common cause of the slowdown that you describe is a poorly implemented context menu handler. Yes, I know you are not activating the context menu to get the problem.

Do you have WinRAR - a widely distributed program and known cause of this type of problem, especially when attempting to use the 64-bit version.

I select disable items and don't work. I'm delete registry CLSID manually

Sorry, my english is bad

Your willingness to delete registry entries manually may be a reasonable indication of what is wrong with your system.

A more prudent approach might be to uninstall programs which you think may be causing the problem.

You haven't provided enough detail for me to of much more help.

maybe, i install a few programs, all necesary for the hardware, video, system and my work.

I must reinstall the system with the last updates???

When I open a folder the system monitor show 26% CPU usage and the bar is 90% red

have you lighten up your context menu? Erase your tracks, such as the recent documents and so on~~~~~Try Rgistry Cleaner~~~Have you done these?

I clean the registry with CCleaner