Windows 7 x64
I'm having persistent trouble with PDF file associations: *sometimes* PDF's open in Windows Media Player. Usually it's when another programme tries to open a PDF, currently Softmaker is the culprit, but I've had the same problem with other software, so I know this is not a Softmaker issue.
I have found no helpful tips online (some others have the problem, but get the usual -
set default file associations e.g. via file context menu, which makes no difference).
So I'm asking here :-)
Starter Question is:where in the REgistry do I set file associations *and* how exactly do I do it ?
=>
IIUC default file associations are here:
HKEY_CLASSES_ROOT\.pdf\
Here's a screenshot:

The persistent handler is:
HKEY_CLASSES_ROOT\.pdf\PersistentHandler
=> (Default) - REG_SZ - {F6594A6D-D57F-4EFD-B2C3-DCD9779E382E}
The shell ex is:
HKEY_CLASSES_ROOT\.pdf\ShellEx\{8895b1c6-b41f-4c1c-a562-0d564250836f}
=> => (Default) - REG_SZ - {DC6EFB56-9CFA-464D-8880-44885D7DC193}
This bit may be irrelevant:
When I search for this {DC6EFB56-9CFA-464D-8880-44885D7DC193} (from shell ex key) I get lots of hits about why preview doesnt work in Outlook. I dont know if this is relevant as I dont use or have Outlook.
https://duckduckgo.c...85D7DC193}&ia=qa_________
Windows 7 x64