The first two things that I would check would be the ATI driver, and also your audio card's driver. Are they the very latest?
Good luck, and welcome to the forum,
Also, how much free, freshly defragmented space is on your C drive?
Hi! Thanks for the answer!
I have Ati Radeon HD 5570, Version 8.670.0.0. I tried to update it twice to 10.11 version, but it didn't work. I had to return to the current version. Windows note only said my current version is the best driver version to my computer.
C-section has 402 Gb space.
What can I do then?
What error messages do you get, when you try to update to the latest driver?
Check the ATI/AMD site carefully for installation instructions. Most often, it is just an Extract and Run, or maybe just Run, if it's an EXE file, but in some cases, there are things that one must do first. The site will give full instruction details, and these might well change by driver version, so what worked last month, might not be the way it will with the new driver.
Windows is not very good, at judging how up to date drivers, especially video drivers, are.