diff --git a/cluster/sge.enable.host.queue.sh b/cluster/sge.enable.host.queue.sh
index 7b019c9..fa4bc8e 100755
--- a/cluster/sge.enable.host.queue.sh
+++ b/cluster/sge.enable.host.queue.sh
@@ -97,6 +97,8 @@ define_vars() {                                                 # {{{
 ${sge_hostname} is the current host."
 		## Enable to verify if pending upgrades are present
 		CHECK_UPGRADE="0"
+		## Enable to verify if upgrades are running
+		CHECK_PROCESS="0"
 	else  ## In case of a remote host
 		debug_message "define_vars − \
 ${sge_hostname} is not the current host."
@@ -108,6 +110,8 @@ ${sge_hostname} is not the current host."
 	if [ -n "${FORCE_MODE}" ] && [ "${FORCE_MODE}" -eq "0" ]; then
 		## Disable upgrade checking (remote host, asked behaviour,…)
 		CHECK_UPGRADE="1"
+		## Disable process checking (remote host, asked behaviour,…)
+		CHECK_PROCESS="1"
 	else
 		## Ensure to define a value
 		FORCE_MODE="1"
@@ -122,6 +126,9 @@ ${sge_hostname} is not the current host."
 		| cut -d"'" -f2 \
 		| tr -s '\n' ' ' )"
 
+	## List of process pattern to monitor
+	maco_proc_pattern="(/opt/maco/bin/maco.autoupdate.sh)"
+	apt_proc_pattern="(aptitude.*full-upgrade|/usr/bin/dpkg.*--configure|dpkg-deb|/bin/sh /usr/lib/needrestart/dpkg-status)"
 }
 # }}}
 is_current_host() {                                             # {{{
@@ -183,6 +190,29 @@ No Maco upgrade require."
 
 	return "${return_maco_upgrade_present}"
 
+}
+# }}}
+is_proc_running() {                                             # {{{
+
+	local_proc_pattern="${1}"
+
+	local_count_proc_pattern="$(pgrep -f -- "${local_proc_pattern}" | wc -l)"
+
+	case "${local_count_proc_pattern}" in
+		0 ) ## No procs related to this pattern are running
+			return_proc_running="1"
+			;;
+		* ) ## At least one proc seems running
+			return_proc_running="0"
+			;;
+esac
+
+	## Simple debug message to valid current variables
+	debug_message "is_proc_running − \
+procs running (with the pattern: ${RED}${local_proc_pattern}${COLOR_DEBUG}) on the current host: ${RED}${local_count_proc_pattern}${COLOR_DEBUG}."
+
+	return "${return_proc_running}"
+
 }
 # }}}
 is_queue_enable() {                                             # {{{
@@ -318,6 +348,19 @@ main() {                                                        # {{{
 			&& exit 0
 	fi
 
+	## If we need to watch for processes
+	if [ "${CHECK_PROCESS}" -eq "0" ]; then
+		## If anything related to APT is currently running
+		### Exit
+		is_proc_running "${apt_proc_pattern}" \
+			&& exit 0
+
+		## If anything related to maco is currently running
+		### Exit
+		is_proc_running "${maco_proc_pattern}" \
+			&& exit 0
+	fi
+
 	## Simple debug message with color to valid current variables
 	debug_message "main − Try to manage \
 SGE queue(s): ${RED}${sge_queues_name_print:=/dev/null}${COLOR_DEBUG}\