After upgrading to Mavericks from Mountain Lion, the computer is not opening most of the programs, with the exception of iPhoto, iTunes and Skype. How to right the wrongs?

I was running Mountain Lion and absent-mindedly upgraded to Maverick.
Now it would be nice to have a computer again...
When clicking on an application in the dock, the icon will reluctantly jump once or twice, and then just calls it a day.
Could somebody please help?

You ran a defective third-party "utility" such as "CleanMyMac" that purports to "clean up" "junk" files. What it really does is to corrupt the operating system.
The first thing you need to do is remove that software, if you know what it is, according to the developer's instructions. Never install it, or anything like it, again. Then see below.
If you don't already have a current backup, back up all data, then reinstall the OS. You don't need to erase the startup volume, and you won't need the backup unless something goes wrong. If the system was upgraded from an older version of OS X, you may need the Apple ID and password you used.
There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
If you installed the Java runtime distributed by Apple and still need it, you'll have to reinstall it. The same goes for Xcode.

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