One-eyed man here, but I'll do what I can...
First, don't cause problems for yourself. The install utility typically installs the bitness version that matches your OS' bitness, so your setup may be correct. If your NLE sees HuffYUV
and/or Lagarith as compression codecs (and renders a readable file), you should leave well enough alone. If not, or if you need 32 and 64 on the same machine, it's probably best to delete everything and be sure.
1. First, check installed programs. I use the free "Revo Uninstaller", which shows both 32- and 64-bit installed versions of both codecs when everything is set up correctly. A screen shot is attached. Windows only shows one entry for each codec and doesn't say whether it's 32- or 64. MS continues to dumb down Windows.
2. If any are shown, uninstall them with revo. Use Revo's "Advanced" scanning mode so it deletes everything it finds (which won't be much). If not, don't sweat it.
3. Look in C:\Windows\System32 for huffyuv
.dll and lagarith.dll and delete them (these are the 64-bit versions). If you knew where the .inf file was located you could uninstall them by running a command, but I don't happen to know the command. If someone else does, chime in.
4. Similarly, look in C:\Windows\SysWOW64 for the 32-bit version and delete them if you find them.
5. I rebooted after that
6. Then I ran the free "CCleaner" and cleaned the registry after that. Keep running scans until it finds no issues.
7. I rebooted again
8. I'd had codec issues for a long time, and was pretty fed up by this point so I pulled out all the stops and launched regedit (the MS command) and searched for huffyuv and lagarith to see if there was anything leftover in the registry. I don't recall if I found anything (I may have) and if I did I'd have deleted the entry. I'm comfy with certain registry edits, but if you're not DO NOT DO IT because you can hose your PC. If I deleted something I'd have rebooted, and then rerun CCleaner again until nothing showed up. I may have downloaded and run a couple of other registry cleanup apps by this time, out of desperation, but it was probably unnecessary).
9. Install the 4 codecs.
10. Review with Revo (once after each codec install if you like)
When you're done the video editor will see the codecs as well (Corel VideoStudio in my case) and let you choose them for compression.
I also changed the default app for .avi files to be Windows Media Player (which plays both HuffYUV and Lagarith files) rather than that awful app "Movies & TV", which can't. It's a simple way to review the file after it's been rendered. You can use VLC if you prefer.