This doesn't work for me? Followed the instructions and get everything installed and verified all settings are on. Ran it and the first time I let it countdown and didn't press FINISH. On next boot it said my copy of W7 was not genuine? OK, clicked authenticate and it did so immediately and continued. However, it couldn't find the PREFETCH and quit? So I looked in the log, true it was logged as such, but on the first boot it was able too? Odd? I'll just delete the files and try again, but press FINISH this time. Same result? Log : This time it is GONE? Found it, it is now not in the root of C: but Windows\System32? ------------------ [2010/12/04-09:23:39.837] Detected Win7RTM physical (ReadyBoot) prefetcher; the SysMain service is auto-started. [2010/12/04-09:23:39.872] Could not delete ReadyBoot boot plan. [2010/12/04-09:23:39.880] Registering for auto-run with a 120000 msec delay... [2010/12/04-09:23:39.881] Completed auto-run change. [2010/12/04-09:23:39.896] Starting trace... [2010/12/04-09:23:40.159] Enabled boot logging to 'C:\Windows\system32\bootPrep_BASE+CSWITCH_1_km_premerge.etl' [2010/12/04-09:26:31.085] Detected Win7RTM physical (ReadyBoot) prefetcher; the SysMain service is auto-started. [2010/12/04-09:26:31.116] Stopping trace... [2010/12/04-09:27:23.958] Stopped kernel logger. [2010/12/04-09:27:24.290] Stopped user-mode logger. [2010/12/04-09:27:24.295] The trace you are capturing "C:\Windows\system32\bootPrep_BASE+CSWITCH_1.etl" may contain personally identifiable information, including but not necessarily limited to paths to files accessed, paths to registry accessed and process names. Exact information depends on the events that were logged. Please be aware of this when sharing out this trace with other people. [2010/12/04-09:28:50.141] Merged ETL file to 'C:\Windows\system32\bootPrep_BASE+CSWITCH_1.etl' [2010/12/04-09:28:50.159] Waiting for prefetcher... [2010/12/04-09:29:20.161] Waiting for Win7RTM prefetcher done. [2010/12/04-09:29:20.162] Saving prefetcher data... [2010/12/04-09:29:20.182] Failed to save prefetcher data (C:\Windows\prefetch\layout.ini) in cab archive (stage 1, error 0) [2010/12/04-09:29:27.965] Saved prefetcher data from C:\Windows\prefetch\ReadyBoot\*.* in cab archive. [2010/12/04-09:29:27.965] Saved prefetcher data from C:\Windows\prefetch\AgCx*.db in cab archive. [2010/12/04-09:29:28.312] Saved prefetcher data from C:\Windows\system32\bootPrep_BASE+CSWITCH_1.ppf.newPlan in cab archive [2010/12/04-09:29:28.333] Starting trace... [2010/12/04-09:29:28.365] Enabled boot logging to 'C:\Windows\system32\bootPrep_BASE+CSWITCH_2_km_premerge.etl' [2010/12/04-09:31:26.720] Detected Win7RTM physical (ReadyBoot) prefetcher; the SysMain service is auto-started. [2010/12/04-09:31:26.729] Stopping trace... [2010/12/04-09:33:20.613] Stopped kernel logger. [2010/12/04-09:33:20.614] Couldn't stop user-mode logger (0x00001069). [2010/12/04-09:33:20.614] Couldn't find user-mode logger in active logger list. [2010/12/04-09:33:20.617] Waiting for prefetcher... [2010/12/04-09:38:10.643] Gave up waiting for Win7RTM physical prefetcher after 300 seconds. [2010/12/04-09:38:10.643] Could not wait for prefetcher. [2010/12/04-09:38:10.643] Stopping trace... [2010/12/04-09:38:10.699] Couldn't find kernel logger in active logger list. [2010/12/04-09:38:10.699] Couldn't find user-mode logger in active logger list. [2010/12/04-09:38:10.700] Unregistering auto-run... [2010/12/04-09:38:10.700] Completed auto-run change. ---------------- Not sure what happened here? Any reason why it couldn't find Prefetch on the 2nd boot? Folder shows updates at the timestamps shown in the last part of the log? Are there access/permissions problems possibly, can't tell for sure? Irv S.