Need some help with my computer

Basically have problems with my computer, it's getting pretty old but its starting to randomly crash. I have a cracked version of Windows 8.1 and I'm not sure if it's the expiration thing or the upgrade the keep telling me about and upon the start up my cursor is starting to jitter after two seconds of moving it. I can't load a web page because it constantly freezes every two seconds and can't even open up google chrome or any other app.

If anyone experienced this and resolved it can you please leave a message below, even if it's just my computer getting old and I need a new one.


If a tech reads this can you send me a message in my inbox, I need some help and clarification.