audio/video stutters/lags when moving mouse

ACER Aspire XC-605 Desktop PC with S240HLBID Full HD 24" LED Monitor
windows 8.1 64-bit
inter core i5 processor 4440
intel hd grathics
2 tb hard drive
8gb ddr3 memory
dvd-super milti drive
card reader
intergrated lan 10/100/1000
wireless lan-bluetooth
with monitor
S240HLBID Full HD 24" LED Monitor
and wireless keyboard
and wireless mouse


It happened Yesterday.

i have turned my PC on as usual, but after 10 to 15 minutes my audio/sound/video/mouse stutters/lags/glitches when i am listening to music, YouTube, CD or when i am playing games like Star Craft 2, Dota 2 or even Mine craft. It is happening to three of the browses i am using: Mozilla, Chrome and Explorer so it is not a problem of the particular browser. i have tried to restart the PC but didn't work, i have tried uninstalling the Adobe flash if that was a case and then restarting the PC, then installing Adobe Flash but the problem is still there. i haven't tried to back up my PC because it is only 2 moths old and i don't want to lose my games and files on the computer.I have even tried to change batteries but still nothing.

if you know what is the cause of this all and you have solution for it please reply me thank you a lot.

PS: about the mouse.
when i am not watching anything, listening anything or even playing anything the mouse still lags and glitches. i have checked the connection still perfectly fine and i have tried to scan my PC if there is not Viruses and nothing is showing up, I am using kaspersky as my antivirus.

PSS: sorry for grammar, spelling and punctuation, i am not English i am Polish in fact.



STILL GOT PROBLEMS WITH THE MOUSE AND KEYBOARD
PROBABLY I WILL RETURN TO THE SHOP SO THEY CAN REPAIR MY COMPUTER BUT FOR NOW I WILL TRY TO ASK FOR SOLUTION

Depending on the wireless keyboard and mouse those devices may be the problem and not the PC. I have a desktop, with an i7 CPU and had similar problems with a Logitech keyboard/mouse unit. I returned those devices to the store and exchanged for a Microsoft wireless keyboard and mouse and no more problems.

Its all acer products

Hard to tell who the OEM is for the keyboard and mouse. But, that could still be the problem.

Maybe same problem as these two:
http://www.eightforums.com/performa...rmance-when-moving-mouse-cursor-new-post.html
http://www.eightforums.com/drivers-...s-sound-tears-performance-drops-new-post.html