System Restore did not complete successfully. An unspecified error occurred during System Restore. (0xc0000022). Tried with two different restore points. Both failed. One possibly relevant historical problem has to do with a file whose name starts at 1 and increments to 1000 at which point System Restore fails because we are all out of piddies. I'm wondering if Norton A-V may present some negative consequences to System Restore. The whole point of this exercise is to remove residual garbage from The Registry that Oracle's high value database software leaves behind when one attempts to undo an installation. One consolation is that the computer at least boots following the failed System Restore. Thanks for small blessings.