I tried to set different variables to import RenderMan shaders and after this Houdini gives me error :

ERROR: GSIDEEF~1/HOUDIN~1.323/houdini/config/Applications/Fuse6.1.314/ViewExtra.ui: Error (Line 0): Variable “JEDI_CameraMenu.dialog” not defined.

Uninstall Houdini doesn't help me, because it doesn't delete Houdini complitly.

Start removing the variables one by one until you find out which one is causing the problem. Most likely, you've set HOUDINI_PATH. This is an environment variable that all Houdini installations use. This has nothing to do whether Houdini is re-installed or not.

yes, but the problem is that I did not set any variables and I have nothing to clean.
I tried to delete Houdini notes from Windows registry editor after uninstalling, but the part of them are locked.

Are you logged in as Administrator?