Spybot S&D (SSD) was running on a XP SP3 in Safe Mode to detect malware. It advised for the correction of 3 registry keys associated with a tracker identified as "Yoobo", or something alike. On prompt, a registry backup was made with SSD. Than the detected problems were solved by SSD (which probably deleted the 3 registry entries). The system was restarted. And it kept restarting over and over. This was stoped in the start consolole. XP would not start with any of the options available, as a message «STOP: c00021a{fatal system error} The Windows Logon Process process terminated unexpectedlly with a status of 0xc0000135 (0x00000000 0x00000000). The system has been shut down.» appeared.
An atempt was made to recover the system with the XP cd. The administrator password was not accepted and the only way to go through was to ignore the password. That worked. Chkdsk /r was run. Disk errors were found and fixed. But the win logon problem was not solved and the same message is displayed. An instalation of "mini XP" was attempted to access the SSD program and restore the saved registry. "mini XP" could not start and the CD it is on is not recognized as bootable any more.
I need to have my system running so I can do my job. Please help me.