if, during installation of Sql Server 2008 you have this error : Performance counter registry hive consistency check failed
First try
Open a command prompt with administrator user rights (Run as Administrator)
cd c;/windows/system32
lodctr /R:PerfStringBackup.INIRestart the system and try again to install sqlserver
Second attempt
Open a command prompt with administrator user rights (Run as Administrator). Lunch install without that feature
C:\MyFolder\SQLEXPR_x86.exe /ACTION=install /SKIPRULES=PerfMonCounterNotCorruptedCheck
