Cant start any modpack


I cant post in the FTB launcher menu so i have to post here…
the launch button is grey and the console says this:
Check your FTB installation location’s write access. Launch button is disabled until installation location is fixed.
AnalyticsBackgroundThread started
FTBLaunch starting up (version 1.4.17 Build: 10417)
OS: Windows 10 10.0 (64-bit)
Launcher Install Dir: C:
System memory: 3235M free, 8156M total
From Console: jan. 07, 2019 4:17:34 DU java.util.prefs.WindowsPreferences
WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(…) returned error code 5.
What can i do?


Where did you install?

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