Windows 10: How come my PC randomly started acting very weird and extremely slow?

Today I let my brother use my computer and everything was fine. Then when I came back upstairs like 30 min later, my apps were scattered around my desktop and everything was slow, like VERY SLOW. I tried restarting and stuff but it still isn’t fixed. I don’t know if I have a virus or what but it’s too slow to open apps I think. My pc isn’t even a year old and this has never happened before. Please help

:)

 

Computer is acting weird

My windows 10 has been acting weird recently and it would randomly open up random apps when im not touching the computer. I have reset it many times it, tried to shut it down than turn it back on but nothing is working.its also virus protected but it still
acts weird.

 

Extremely slow pc suddenly windows 8.1

Windows 8.1 suddenly my pc is extremely slow any suggestions please

 

Mouse cursor acts weird

Good morning everyone, I hope some of you can help me.

My mouse cursor acts extremely weird: when I left click it randomly executes a right click. Right now I must do a project on Inventor and it's basically impossible to continue.

This is what I tried so far, but the problem persists:

- try another mouse,

- try a different usb port,

- use only the touchpad,

- disable the touchpad and use only the mouse,

- in mouse settings the left click is set as the main button

- restart the pc

- windows 10 is fully updated to build 1803 ( 17134.254)

The problem appeared yesterday evening.

Any help would be greatly appreciated

Yours, Alessandro