After updating to Mavericks imac loads but nothing opens

Question

I have loaded Mavericks and followed the details exactly. Now when I boot up my computer may open fully or only partially. When open clicking on any application or function: eg drive, setup, mail etc. they do not open. Force quit is not available. I have booted up and used the emergency drive and scanned my HD with no errors.I have also reloaded a fresh download with no success, I am now at a loss.
Les

Answer 1

Both of those need to be removed.
MacKeeper is just plain crap. Avoid at all costs.
Kaspersky is okay (not great), when it comes to detecting Mac malware, but the company has had some issues with their Mac software in the recent past, including one tool that locked people out of their user accounts. I would bet it isn't compatible with Mavericks.
Of course, if you can't actually start up the computer anymore, removing them may be tricky. Try restarting in safe mode. If you can do that, then try uninstalling from there. The disk image file containing the Kaspersky installer also contains an uninstaller... if you no longer have that disk image file, you'll need to re-download Kaspersky. MacKeeper should delete itself when dragged to the trash, but that won't work in safe mode, so I would wait and uninstall MacKeeper once you have restarted normally (if possible).