I can't find a solution to this one anywhere, and I've tried several different things, so I'm asking for help.
Whenever I use Flash Player anywhere, on Chrome or Firefox, winlogon.exe spikes to the point where 100% of my CPU is utilized every 3-5 seconds and I have no choice other than to reboot my desktop. I've tested this in Process Explorer about 100 times now, and the same thing happens every time.
I have a Windows XP64 SP3 desktop, with a dual core Pentium 3.0 gHz processor, 4 GB of RAM (of which at least 2 GB is available at any given time), an nVidia GeForce 810 video card with 1 GB of RAM on it, and about 164 GB of free space on the operating system hard drive partition (I had to split my hard drive up into multiple partitions because it's a web development machine and it makes life much easier when I do that).
I've upgraded my video card drivers.
I've defragmented my hard drive.
I've cleaned out temporary files.
I've made sure to disable the PPAPI plugin in Google Chrome (v. 27.0.1453.110 m), even though this happens in both Chrome and Firefox.
I've disabled video acceleration, both on the card and within Flash Player.
I've run Malwarebytes and Avast is always running on the machine.
I've shut down anything else that might be running at the time.
What I can't figure out is what winlogon.exe has to do with Flash Player and why it's utilizing so much resource, and how I stop it from doing that.
Thanks.