Windows: add a notice to NSIS in case of BSOD while installing Npcap

(cherry picked from commit a07898a280)

packaging/nsis/NpcapPage.ini

@@ -1,5 +1,5 @@
 [Settings]
-NumFields=7
+NumFields=10
 
 [Field 1]
 Type=GroupBox
@@ -43,6 +43,30 @@ Bottom=58
 Text=This text will be replaced, depending on whether Npcap is already installed
 
 [Field 6]
+Type=GroupBox
+Left=0
+Right=-1
+Top=70
+Bottom=105
+Text=Important notice
+
+[Field 7]
+Type=Label
+Left=10
+Right=290
+Top=80
+Bottom=88
+Text=If your system has crashed during a Wireshark installation, you must run the command
+
+[Field 8]
+Type=Label
+Left=10
+Right=295
+Top=89
+Bottom=97
+Text='net stop npcap' as Administrator before upgrading Npcap, so that it doesn't crash again
+
+[Field 9]
 Type=Link
 Left=0
 Right=290
@@ -51,7 +75,7 @@ Bottom=120
 Text=Get WinPcap
 State=https://www.winpcap.org/
 
-[Field 7]
+[Field 10]
 Type=Link
 Left=0
 Right=290