Windows 8.1 "explorer.exe" gradually slows down - Observation

Hi, I posted a question a year ago about Windows 8.1 gradually slows down issue, and it seems still not being solved. I recently found some new clues about this, hope it can be useful. (Please read the original post first
since it contains basic descriptions of the issue:
https://social.technet.microsoft.com/Forums/en-US/f9ab40a8-6681-4c66-bdbd-9de7b2fb021f/windows-81-gradually-slows-down-after-hours-speed-returns-normal-if-restart-explorerexe?forum=w8itproperf)
This issue is found to be somehow related to total Page Faults of explorer.exe since it starts. The majority of page fault is created by desktop background slide show. On my laptop, the slide show is set to randomly switch between 53 jpegs
(mostly 1920*1080) every 10 seconds. The Page Fault Delta of explorer.exe is usually 2 per second when not doing anything, and tenth to hundreds when there are some actions. But at the instance when the background is switching, it will peak to a value
between 13,000 and 30,000.
I don't know if this value is normal or not, but when the total Page Faults reaches about 20,000,000, a slight slow-down can be observed by moving your mouse up and down on the favorite bar items in IE (the right bar shown when pressing Alt+C
in IE), a slight lag can be observed. The slow down (slightly) of normal windows can be observed when Page Faults reaches about 40,000,000. At that time, the mouse lag on favorite bar items becomes much more obvious. After another few hours, the slow-down
will become more serious.
I tried to disable the slide show by only using one background image, the total Page Fault stays low and the slow-down issue does not occur after one day (the Page Fault after one day is also far less than 20,000,000). That's why restarting explorer.exe
can temporarily fix it. I tried it on 2 other Windows 8.1 computers and get the same results. Maybe there is some memory allocation or fragmentation problem building up? One thing I don't know is that if this is caused by the background slide show itself,
or if explorer.exe in general will slow down after experimenting enough page faults.

Polyhedron,
This main reason of this issue is not the Windows system. A page fault occurs under these situation:
1. A program requests an address on a page that is not in the current set of memory resident pages. 
2. The virtual memory system has become unstable because of a shortage of physical memory (RAM).
3. The virtual memory system has become unstable because of a shortage of free disk space.
4. The virtual memory area is corrupted by a program.
5. A program is attempting to access data that is being modified by another program that is running.
Please refer this blog to determine it's hard faults or soft faults.
The Basics of Page Faults
http://blogs.technet.com/b/askperf/archive/2008/06/10/the-basics-of-page-faults.aspx
In addition, from your description, since the background slide itself is without problem, I suspect the root is your ram. Try to increase the amount of memory or reduce the cache size for test.
Karen Hu
TechNet Community Support

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    See the following:
    Kappy's Personal Suggestions for OS X Maintenance
    For disk repairs use Disk Utility. For situations DU cannot handle the best third-party utilities are: Disk Warrior; DW only fixes problems with the disk directory, but most disk problems are caused by directory corruption; Disk Warrior 4.x is now Intel Mac compatible. TechTool Pro provides additional repair options including file repair and recovery, system diagnostics, and disk defragmentation. TechTool Pro 4.5.1 or higher are Intel Mac compatible; Drive Genius is similar to TechTool Pro in terms of the various repair services provided. Versions 1.5.1 or later are Intel Mac compatible.
    OS X performs certain maintenance functions that are scheduled to occur on a daily, weekly, or monthly period. The maintenance scripts run in the early AM only if the computer is turned on 24/7 (no sleep.) If this isn't the case, then an excellent solution is to download and install a shareware utility such as Macaroni, JAW PseudoAnacron, or Anacron that will automate the maintenance activity regardless of whether the computer is turned off or asleep. Dependence upon third-party utilities to run the periodic maintenance scripts had been significantly reduced in Tiger and Leopard.
    OS X automatically defrags files less than 20 MBs in size, so unless you have a disk full of very large files there's little need for defragmenting the hard drive. As for virus protection there are few if any such animals affecting OS X. You can protect the computer easily using the freeware Open Source virus protection software ClamXAV. Personally I would avoid most commercial anti-virus software because of their potential for causing problems.
    I would also recommend downloading the shareware utility TinkerTool System that you can use for periodic maintenance such as removing old logfiles and archives, clearing caches, etc.
    For emergency repairs install the freeware utility Applejack. If you cannot start up in OS X, you may be able to start in single-user mode from which you can run Applejack to do a whole set of repair and maintenance routines from the commandline. Note that AppleJack 1.5 is required for Leopard.
    When you install any new system software or updates be sure to repair the hard drive and permissions beforehand. I also recommend booting into safe mode before doing system software updates.
    Get an external Firewire drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is not significant):
    1. Retrospect Desktop (Commercial - not yet universal binary)
    2. Synchronize! Pro X (Commercial)
    3. Synk (Backup, Standard, or Pro)
    4. Deja Vu (Shareware)
    5. Carbon Copy Cloner (Donationware)
    6. SuperDuper! (Commercial)
    7. Intego Personal Backup (Commercial)
    8. Data Backup (Commercial)
    9. SilverKeeper 2.0 (Freeware)
    10. MimMac (Commercial)
    11. CloneTool Hatchery (Shareware)
    12. Clone X (Commercial)
    The following utilities can also be used for backup, but cannot create bootable clones:
    1. Backup (requires a .Mac account with Apple both to get the software and to use it.)
    2. Toast
    3. Impression
    4. arRSync
    Apple's Backup is a full backup tool capable of also backing up across multiple media such as CD/DVD. However, it cannot create bootable backups. It is primarily an "archiving" utility as are the other two.
    Impression and Toast are disk image based backups, only. Particularly useful if you need to backup to CD/DVD across multiple media.
    Visit The XLab FAQs and read the FAQs on maintenance, optimization, virus protection, and backup and restore.
    Additional suggestions will be found in Mac Maintenance Quick Assist.
    Referenced software can be found at www.versiontracker.com and www.macupdate.com.

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