diff --git a/pkg-install b/pkg-install
index cb8cfc4..e152fe4 100755
--- a/pkg-install
+++ b/pkg-install
@@ -34,7 +34,7 @@ apt_diagnose() { #Explain stdin-inputted apt errors to user and list ways to fix
   errors="$(cat /dev/stdin)"
   
   #check for 'E: The repository'
-  if echo "$errors" | grep -q 'E: The repository' || echo "$errors" | grep -q 'sources.list entry misspelt' ;then
+  if echo "$errors" | grep -qF 'E: The repository' || echo "$errors" | grep -qF 'sources.list entry misspelt' ;then
     message_to_user "APT reported a faulty repository, and you must fix it before Pi-Apps will work.
 
 To delete the repository:
@@ -45,7 +45,7 @@ sources.list requires root permissions to edit: sudo mousepad /path/to/file"
   fi
   
   #check for 'NO_PUBKEY'
-  if echo "$errors" | grep -q 'NO_PUBKEY';then
+  if echo "$errors" | grep -qF 'NO_PUBKEY';then
     echo -en "\e[93m
 ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
 APT reported an unsigned repository. This script will try to repair it.
@@ -62,14 +62,14 @@ Waiting 10 seconds... Press Ctrl+C to cancel.\e[39m"
   fi
   
   # check for 'Could not resolve' or 'Failed to fetch'
-  if echo "$errors" | grep -q 'Could not resolve' || echo "$errors" | grep -q 'Failed to fetch' || echo "$errors" | grep -q 'Temporary failure resolving' || echo "$errors" | grep -q 'Network is unreachable';then
+  if echo "$errors" | grep -qF 'Could not resolve' || echo "$errors" | grep -qF 'Failed to fetch' || echo "$errors" | grep -qF 'Temporary failure resolving' || echo "$errors" | grep -qF 'Network is unreachable';then
     message_to_user "APT reported an unresolvable repository.
 
 Please check your Internet connection and try again."
   fi
   
   #check for 'is configured multiple times in'
-  if echo "$errors" | grep -q 'is configured multiple times in';then
+  if echo "$errors" | grep -qF 'is configured multiple times in' ;then
     message_to_user "APT reported a double-configured repository, and you must fix it to fix Pi-Apps.
 
 To delete the repository:
@@ -80,35 +80,35 @@ sources.list requires root permissions to edit: sudo mousepad /path/to/file"
   fi
   
   #check for "--fix-broken"
-  if echo "$errors" | grep -q "\-\-fix\-broken" || echo "$errors" | grep -q "needs to be reinstalled" ;then
+  if echo "$errors" | grep -qF "\-\-fix\-broken" || echo "$errors" | grep -qF "needs to be reinstalled" ;then
     message_to_user "APT reported a broken package, and you must fix it before Pi-Apps will work.
 
 Please run this command: sudo apt --fix-broken install"
   fi
   
   #check for dpkg --configure -a
-  if echo "$errors" | grep -q "dpkg \-\-configure \-a" ;then
+  if echo "$errors" | grep -qF "dpkg --configure -a" ;then
     message_to_user "Before dpkg, apt, or Pi-Apps will work, dpkg needs to repair your system.
 
 Please run this command: sudo dpkg --configure -a"
   fi
   
   #check for faulty dphys-swapfile package
-  if echo "$errors" | grep -q "error processing package dphys-swapfile" ;then
+  if echo "$errors" | grep -qF "error processing package dphys-swapfile" ;then
     message_to_user "Before dpkg, apt, or Pi-Apps will work, dphys-swapfile must be fixed.
 
 Try Googling the above errors, or ask the Pi-Apps developers for help."
   fi
   
   #check for insufficient space errors
-  if echo "$errors" | grep -q "You don't have enough free space in" ;then
+  if echo "$errors" | grep -qF "You don't have enough free space in" ;then
     message_to_user "Package(s) failed to install because your system has insufficient disk space.
 
 Please free up some space, then try again."
   fi
   
   #check for unconfigured boot-firmware package
-  if echo "$errors" | grep -q "missing /boot/firmware, did you forget to mount it" || echo "$errors" | grep -q "u-boot-rpi" ;then
+  if echo "$errors" | grep -qF "missing /boot/firmware, did you forget to mount it" || echo "$errors" | grep -q "u-boot-rpi" ;then
     message_to_user "Package(s) failed to install because your boot drive is not working.
 
 You must fix the u-boot-rpi package before dpkg, apt, or Pi-Apps will work."
@@ -122,7 +122,7 @@ Please look at the above errors to see how long you have to wait."
   fi
   
   #check for typo in sources.list and list.d
-  if echo "$errors" | grep -q "The list of sources could not be read." ;then
+  if echo "$errors" | grep -qF "The list of sources could not be read." ;then
     message_to_user "One or more sources contain a typo. Before APT or Pi-Apps will work, you must look around in /etc/apt/sources.list and /etc/apt/sources.list.d and fix the typo."
   fi
   
@@ -135,7 +135,7 @@ Perhaps this link will help: https://askubuntu.com/questions/909719/dpkg-unrecov
   fi
   
   #check for "Command line option --allow-releaseinfo-change is not understood"
-  if echo "$errors" | grep -q "Command line option --allow-releaseinfo-change is not understood" ;then
+  if echo "$errors" | grep -qF "Command line option --allow-releaseinfo-change is not understood" ;then
     message_to_user "The Debian Project recently upgraded from Buster to version Bullseye. As a result, all Raspberry Pi OS Buster users will receive APT errors saying the repositories changed from 'stable' to 'oldstable'.
 
 This error broke pi-apps. To fix it, the Pi-Apps developers added something to the 'sudo apt update' command: --allow-releaseinfo-change.
@@ -154,10 +154,19 @@ Perhaps reinstalling the package would help?"
   fi
   
   #check for "installed raspberrypi-kernel package post-installation script subprocess returned error exit status 1"
-  if echo "$errors" | grep -q "installed raspberrypi-kernel package post-installation script subprocess returned error exit status 1" ;then
+  if echo "$errors" | grep -qF "raspberrypi-kernel package post-installation script subprocess returned error exit status" ;then
     message_to_user "The raspberrypi-kernel package on your system is causing problems.
 Pi-Apps, dpkg and APT won't work properly until the problem is fixed.
 
+Google the errors above this message, or ask in the Raspberry Pi Forums.
+https://www.raspberrypi.org/forums"
+  fi
+  
+  #check for "raspberrypi-bootloader package pre-installation script subprocess returned error exit status 2"
+  if echo "$errors" | grep -qF "raspberrypi-bootloader package pre-installation script subprocess returned error exit status" ;then
+    message_to_user "The raspberrypi-bootloader package on your system is causing problems.
+Pi-Apps, dpkg and APT won't work properly until the problem is fixed.
+
 Google the errors above this message, or ask in the Raspberry Pi Forums.
 https://www.raspberrypi.org/forums"
   fi
@@ -170,6 +179,11 @@ Maybe reinstalling it would help?
 sudo apt install --reinstall nginx-full"
   fi
   
+  #check for "installed libwine-development:arm64 package post-installation script subprocess returned error exit status 1"
+  if echo "$errors" | grep -qF "libwine-development:arm64 package post-installation script subprocess returned error exit status" ;then
+    message_to_user "This error was not caused by Pi-Apps, it is caused by your libwine-development package."
+  fi
+  
   #check for "W: Did not understand pin type releace"
   if echo "$errors" | grep -qF "Did not understand pin type" ;then
     message_to_user "This error was not caused by Pi-Apps. Looks like there is a typo in your /etc/apt/sources.list"