Hi, First of all, thanks for the tips MagicAndre1981, I followed your speed up guide and got something like 30% of boot time reduction. I have a doubt, i found that the c:\Windows\Prefetch\ReadyBoot have only the TraceX.fx files before i run the xbootmgr command, after that i found a lot of files inside this dir, named as fxboot_xxxxx. Only after running the xbootmgr I found these optimization files. Would you know why Microsoft didnt programmed Windows to optimeze itself (i mean automatically)?