Yes, in my case it was hi10p with an extremely heavy subtitle sample which was failing to playback in real-time in some parts with xy-VSFilter, until I fixed the throttling issue.
Problems like I experienced are usually some sort of incompatibility between the motherboard BIOS ACPI interface and Windows 8.
But since it's always worked fine on Windows 7, I wouldn't rule out a bug in Windows 8 power management which affects some systems.
Other things you could try
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Disabling dynamic tick from an Administrative CMD prompt and rebooting:
bcdedit /set disabledynamictick yes
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Install all Recommended Updates from Windows Update, most importantly:
General Availability Cumulative Update
Cumulative Update: November 2012
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Ensure that you've installed up-to-date Windows 8 drivers for your GPU, Sound, Storage, USB, and Intel Chipset from each manufacturer.
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Extract
LAV Filter 0.54 on top of the LAV files in your CCCP directory, open the CCCP settings application, Reset Settings & Re-Register Filters, enable LAV Video.
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