I downloaded Maverick yesterday and now my computer is very slow.
Be careful I won't recommend to download Maverick so far.
I highly recommend Mavericks. I have been using it for over a year and it is much snappier and less problems than any previous OS.
I whiz I can go back easily.
Just restore from the backup you made prior to upgrading.
Try running this program and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read.
Please describe the problem in as much relevant detail as possible. The better your description, the better the chance of a solution.
For example, if the computer is slow, which specific actions are slow? Is it slow all the time, or only sometimes? Have you seen any alerts or error messages? Have you done anything to try to fix it? Most importantly, do you have a current backup of all data? If the answer to the last question is "no," back up now. Ask if you need guidance. Do nothing else until you have a backup.