My computer appears to freeze on occasion too >> BUT what I have noticed when this happens that the HDD light is solid ON. Even trying to do a CTRL-ALT-DEL to get to the Task Manager (TM) is difficult - takes a long time. So, what is going on here?
I notice that Opera has ELEVEN listings in the TM and a LOT of memory (collectively 310+MB) is being used >>> WHY? This is true even when you first start the program and with only the single basic tab showing. All of those are set for 'normal' priority according to the TM. BUT, Opera is decidedly THE cause for what appears to be a crash. If you are patient, the 100% disk access eventually - eventually - times out and things return to normal. Opera itself has NEVER crashed on my computer. I'm running version 25.0.1614.50.
I do not use Opera for e-mail or chats or anything but Internet browsing. I'm running WIN 8.1 64-bit on a relatively new Samsung all-in-one with 8GB RAM and lots of HDD space and it has NO other problems.
If I do not run Opera, I never see any other 100% disk usage except on startup.
Seems to me that Opera is over-riding ANY other function or access when this happens.
There is OBVIOUSLY an issue that needs to be found and resolved.