Time messing up on my system

[Guest]

I bought my computer brand new just over a year ago. In the past month, I
have noticed that the time keeps changing on me. Sometimes it'll be hours
ahead, other times it'll be hours behind and I have to go in and fix it. No
one else is using my computer, so it's not like someone is changing the time
to play a prank on me or something. I have no idea what is going on, but
it's really starting to frustrate me. Anyone explain what is happening here?
Why is the time changing on my computer? Nothing else is messed up with my
system except the time. Hope someone can help!

 

[Fat Kev]

Have you got Windows Defender installed on your system? Also, what is
the memory of your system?

I had the same problem some months ago and I resolved this by installing
additional memory module. Windows Defender is trying something but it
does not stop even if the system is switched off!!

 

[Guest]

I'm not sure what Windows Defender is. I've never heard of it before. How
do I find out what the memory of my system is? That download for additional
memory module, is that free? Where can I find that? How come the other
computer I had didn't have this same problem? Is this a common problem?