It wasn't like this before. Right now it's so slow that when you turn it on and you click something, it literally takes like 2 minutes for that to pop up. If you click something else it'll just freeze. I'm pretty good with computer but I just can't figure this one out, I'm stumped. Does anyone know anything I can do to see if I can fix it. Things just don't seem to respond.

SPECS:

?AMD Phenom II X4 Quad-Core N970 processor 2.2GHz, 2MB L2 Cache
?4GB DDR3 SDRAM system memory (expandable to 8GB)
?500GB SATA hard drive
?8x SuperMulti DVD Double-Layer Drive
?17.3" HD+ widescreen CineCrystal display


Thats all the specs I could get, its so slow that I can't even check... Please help me.