GXT

My scroll wheel is not working properly and I think the issue is that it's dirty inside, so I am trying to open it. I've found a scew below a sticker and the bottom part is now loose, but the top part still won't open, as if there were more screws. I cannot see any other screws below the sticker...

About 3 months ago my lenvo ideapad 100s-11iby started running kind of slow so i decided to factory reset. (i have done that about 10 times because of file build up) So it normally would pop up with the lenvo logo on start up but it flashes and goes away then comes back for 1 second and then its...