Just understand...all replies will be personal opinion only...nothing that anyone should cast in stone and...probably varying from person to person .
My first contrarian comment...will be the idea that there is some correlation between the passing of time...and the use of your computer. I don't believe in the idea that doing whatever once a month or weekly or whenever...is controlled by the passage of time that has no correlation to whatever takes place on the system. Aside from installing critical updates ASAP and updating your AV program ASAP...the system tends to let users know when preventive maintence should be done, IMO. Systems with high usage (like mine) will provide indicators, if only users will look and pay attention. Systems with low mileage...well...I've never had one of those and maybe scfheduling is the thing to do.
Malwarebytes...really no reason to keep it installed, let alone schedule running of it. It's an on-demand scanner but...IME, it has never outperformed using an updated, reliable AV and SUPERAntispyware. I just use it to verify what those two have found on infected systems belonging to people I know and elect to clean periodically.
I have no opinion of what WinPatrol might be used for.
Norton programs are overrated in the minds of the public. That doesn't mean that they are ineffective, just that there are other AV programs that do just as well, if not better...and do so with less burden on the system. Combine that with the fact that one pays for it...and it's not on my list of things to do .
Defragging is one of the more neglected tasks which users should do routinely...on each partition that is part of the system. However, I see that you have neglected to understand that the chkdsk /r command...is far more important and should also be run routinely...probably more often than the defrag command. In addition, as a general rule, I suggest running the chkdsk /r command...anytime that a user decides to defrag...before beginning the defrag.
Programs like ARO...should never even be contemplated as worthy of installation/use on a system. Since most users have no idea what "the registry" might be...I find it utterly amazing that such users feel compelled to install/use "registry cleansers", "registry optimizers" and the such. Who was it that said..."there's a sucker born every minute? Rather than start a long diatribe about such programs...I'll just say that an intelligent user will not install/use such.
No need to scan a hard drive on a scheduled basis...they don't fail on a scheduled basis . I have right now hard drives which I bought 10 years ago and they are fine and I also have 3 SSDs which are fine. The time to run a hard drive utility is...1) before installing any O/S...2) when you start having strange problems with varied errrors and functions. The reason I suggest doing before install should be obvious...the hard drive is the foundation on which the partition and file system (and Windows) will rest. As for problem situations...hard drive failure or problems occur with far more regularity than just about anyt other mishap other than file corruption (and hard drives can cause file corruption).
Panda is a good AV.
Secunia Software Inspector...is somewhat overrated, IMO. Every program which I have installed that needs updating...already has a mechanism for updating automatically or letting me know that it needs updating...so Secunia really doesn't do anything that isn't already done, IMO.
I cannot believe that anyone...would plan on scanning with AV monthly...when there are new malware threats being foisted on all of us daily or momentarily. But, that's just my perspective.
CCleaner..another app that does primarily what Windows offers in the way of cleanup functions...but also includes a "registry cleaner". This app draws a black mark from me because it considers dump files to be of no value and deletes such automatically...when the truth is that dump files are often the only indicators of what may be wrong with a given system.
Just my two cents...maybe a nickel .