You may have some programs running that just take their time shutting down. Before shutting down, use control/alternate/delete to bring up the list of running programs. You may find a lot more than you thought. Through 'start/msconfig/startup' you can view start up programs and uncheck those that are not necessary. A few may reinsert themselves because they are controlled in the registry or elsewhere rather than msconfig. Cleaning out excess files using disk cleanup, checking directory/file structures using checkdisk, and doing a defragmentation using disk defragmenter can't hurt and may improve the condition. As always, check for viruses and spyware when the system unexpectedly slows down. You can also try a program in WINDOWS\SYSTEM32\shutdown.exe -s -t 1 (there are spaces between the parameters) which will force running programs to shut down. It closes down my system faster when I use it though your condition is excessively slow. I assume you are running XP. I hope this helps. Tom Mayer ----- Original Message ----- From: "Antonio" <[log in to unmask]> My computer take around 10 to 20 minutes to shutt down, I recently change the power supply to a new, because the old one burn; I check the bios setting, the power setting is configure correctly, hibernate is turn off, I don't know what else to try, can anyone help me?; I have HP pentium 3 1.2ghz with 512 mb , the power supply is 450 W, the old one was 300 W, I check all cables an seem to be good. Sincerely Thank you. Antonio. PCBUILD maintains hundreds of useful files for download visit our download web page at: http://freepctech.com/downloads.shtml