Mavericks randomly freezing, but not freezing (odd)

Hi guys, I hope someone can help.

I managed to upgrade to Mavericks using Unibeast and Multibeast, and even got iMessage and iCloud working (neither of which worked under Mountain Lion). I'm now experiencing a strange problem: at random times, all applications stop responding however the mouse pointer still responds to movement. Sometimes it happens when I'm opening a link, other times it's when I try to open a file. Most time's it just shows the standard mouse pointer but a couple of times it's been the spinning beach ball.

If I try and click on applications or attempt to take control of my system in any other way (e.g. trying to bring up the force quit dialog) nothing happens. Occasionally while it is doing this the hard drive starts chugging away, however other times it doesn't.

I've had activity monitor running and nothing appears to be hogging resources when these freezes happen, and leaving it to sit makes no difference - the only solution is to cycle power.

I've not seen anyone else remarking on the same issue, and I fear I may have to do a clean install in order to resolve, but I wanted to see if anyone has any ideas.

Thanks in advance for any help you can give

You're not alone
I'm experiencing the same issue, among other stuff

No solution to offer you. Just wanted to chip in and tell you that I have the same problem.

Gigabytr GA-Z77-DS3H, i5 3570k, Nvidia GT640

I've had similar problems using google chrome while downloading it just froze it has happen like three times.

gigabyte h87-d3h
i5-4430 LGA 1150
with mavericks

couldn't do nothing but cycle reset the system.

This has happened to me three times since moving to Mavericks. What is interesting is that the freeze seems localized at first to certain apps, but then eventually locks the system up entirely except for mouse pointer movement. In each case so far I've noticed that Google Chrome was the app I was using when it happened. Other apps responded fine initially, and movies continue to play in vlc. Finder however only shows the beach ball and I am unable to bring up the kill process window, or trigger a restart through the menus.

I'm thinking that it may be some sort of problem relating to Chrome at least for me. Going to switch browsers for a while to test.

Users of Virtual Box are mentioning similar symptoms with that app when Chrome is running on the host system. https://www.virtualbox.org/ticket/12246

What browsers are you using? Is this a common element?
I'm using a GA-Z77X-UP5 TH.

I mainly use safari, but I do have chrome installed. I might uninstall that and see if it makes a difference, in case its mere presence is a contributing factor.

I also repaired permissions on my drive, however there has been another freeze since then.

Uninstalled Chrome using CleanMyMac to make sure everything is removed, and then did a restart. Let's see if this makes a difference

*UPDATE*

It just did it again, but it did what I can only describe as a soft reboot - all apps closed, finder restarted, then all apps loaded again. There was a 90 second freeze but still with moveable mouse pointer prior to that.

Yep I had the problem.. Mine was caused by a logitech mouse and LCC

My solution was to remove every thing that belonged to logitech and the LCC.
Reboot
Download the new Mavericks version (3.8) from logitech
Install it, reboot

Problems Gone

Trying that now...