For a realtime antispyware prog I much prefer SpywareTerminator.click here
I tried BoClean some time ago but was not very happy with it (over zealous and too many false positives was the reason - I think)
If your McAfee sub is expiring then you will need a replacement anti-virus prog (Avast or AVG are both free).
BoClean is an anti spyware/malware prog not an anti virus prog.
Having said that there is no reason not to try BoClean yourself.