Intel Core2Quad desktop PC Windows7 64bit OS I use Returnil from many years and I installed it succesfully every times but a week ago I formatted the PC and installed Returnil System Safe 2011 as one of the first program, after the essentials, and post installation instead of opening the program a window inform me that 'Returnil System Safe 2011 core system is not available'. I proved to uninstall and re-install it after a couple of day, I proved to sostitute every Returnil folder on the PC with a working copy from the precedent OS installation but without solve nothing. I compared the log file with an old one finding this differences: 'MoveFiles: File: rvsmon.upd, Directory: C:\ProgramData\Returnil\RVS3\Data\, Size: 61863424' and 'InstallFiles: File: CJSC Returnil Software Website.url, Directory: C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Returnil\, Size: 66' present on the old working one and not on the new; 'RollbackCleanup: File: C:\Config.Msi\78345.rbf RollbackCleanup: File: C:\Config.Msi\78346.rbf RollbackCleanup: File: C:\Config.Msi\78347.rbf' only on the new log. Some solution for this problem? Thank you.