Unfortunately the System Restore was not actived.
The model of chipset is Intel HM87 / Intel Corporation 8 Series/C220 Series Chipset Family
The computer is a laptop by MSi
(I have tried to install the old and original version of IRST (version 188.8.131.520) downloaded on the web site of Msi but the same problem now)
No installation works and I can't remove all the traces of the crashed installation because I have not had IRST installed properly.
I have installed a new version of Windows on another computer with the same name of user.
I have installed IRST with a log of the installation (Revo Uninstaller Pro)
I have copied the log on USB key
I have pasted the log on the computer with crashed installation of IRST
I have uninstalled all the traces of IRST with the log
I have installed the latest IRST and... Everything is ok and works propely now.
I respire and I can take a cup of tea
For the future : The best way to install a new version of IRST is to remove the present version before and not just overwrite.
Thank you very much.
Ps. I keep the log for anybody if need some help (just change the name of user inside with Notepad)