Hard drive problem?

[T3CHN0RRI5]

About a month ago WIN 8.1 32 bit ran perfectly,booting up within 3 secs.but now my speed's gone so bloody low I guess it's the hard drive that's out.It literally took me 3 hrs to startup my pc pus horrible lag.

 

[T3CHN0RRI5]

Pleasehelpmebros!!!!ShouldIUPGRADE?Ifsosuggestaharddrive(HDD)around50$1TBpreferrable.