am seeking a very good Freeware Registry Cleaner,can anyone recommend a good one? any help appreicated,thnks.

I have to give my laptop back to work. I want to erase EVERYTHING I possibly can. I know how to do the basics with deleting history and cleaning out temp files but I want all of the stuff that is deep in the recesses of the hard drive GONE any help is appreciated! THANKS!

i have windows vista ultimate adn wehn i firsted installed it i did alot of tweaking to make it very fast, and it was. the shutdown, startup and running was really good. but it has been 2 weeks now that the startup has really slowed down. and this is the part where it is really slower that before:

http://www.techmixer.com/pic/2007/04/vista-default-boot-screen.jpg

i think this happened after i installed a game, but i uninstalled it again and it hasnt changed the speed of the startup, its still slow.

BTW I ALWAYS PERFORM DISK DEFRAGMENTER, REGISTRY DEFRAGMENTER, DISK CLEANER, REGISTRY CLEANER, AND VIRUS SCANNING. I HAVE ALSO DISABLED EVERYTHING FROM "MSCONFIG" EXCEPT FOR MY INTERNET SECURITY.

the shut down and running is still good, but its only the startup so why has my pc slowed down?? please help!!
oh yeah and i have also disabled many services that i dont need.