After installing Mavericks, computer is slow and applications are slow to open

Question

Mavericks has slowed my IMAC to a crawl. Applications are slow to open. Disc burning is slow as well as photo editing. Any Idea's

Answer 1

We need more info about your iMac other than "My iMac is running slow."
What year, screen size, CPU speed and amount of RAM installed?
To find out info about your system, click on the Apple symbol in the upper left of the OS X main menu bar. A drop down menu appears. Click About this Mac. A smaller popup window appears. This gives you basic info like what version of OS X your iMac is running, the speed of your iMac's CPU and how much RAM is installed.   Click on the button that says More Info. A larger window appears giving you a complete overview of your iMac's hardware specs. Highlight all of this info and copy/paste all of this into another reply to this post, editing out your iMac's serial number before actually posting the reply. This will tell us everything about your iMac so we may begin to help with your iMac issues.
How full is your Mac's hard drive?
Locate your iMac's hard drive icon on the OS X desktop. Click the icon once, then use the keyboard key combination Command-I. This will give you additonal info about your iMac's internal hard drive.
How many applications do you run simultaneously in the background while working in another application?
Do you run any antivirus software on your Mac? Antivirus software can slow down the normal operation of OS X.
Conpletely uninstall any virus software you have installed following the anti-virus deveolper's instructions.
Do you run any "crapware" like Mackeeper or any other type of "crapware" like so called hard drive "cleaning" apps?
Another her possibilty is that some hardware, like your iMac's hard drive, could be failing.