Stalls and slowdowns

[Joe Kimmel]

Anyone else running OS X on a slow machine (333 iMac).  All of a sudden I am
going very slow in my apps.  I made a mistake and bought an HP all-in-one
printer, scanner, etc.  Well it eats the processor at 90+ % at times and has
many problems.  Now...even when I turn that off my mac is running ultra slow
now.  I wish there was a good optimizer out there now. I understand the new
DiskWarrior will have one as well as Tech Tool Pro...

Any other ideas.  My HD is a bit full, but I am remedying some of that.