diff --git a/snigdhaosassistant.cpp b/snigdhaosassistant.cpp
index 0ba66df..b84a690 100644
--- a/snigdhaosassistant.cpp
+++ b/snigdhaosassistant.cpp
@@ -67,3 +67,114 @@ void SnigdhaOSAssistant::doInternetUpRequest(){
     });
 
 }
+
+
+void SnigdhaOSAssistant::doUpdate(){
+    if (qEnvironmentVariableIsSet("SETUP_ASSISTANT_SELFUPDATE")) {
+        updateState(State::SELECT);
+        return;
+    }
+    auto process = new QProcess(this);
+    QTemporaryFile* file = new QTemporaryFile(this);
+    file->open();
+    file->setAutoRemove(true);
+    process->start("/usr/bin/exec-terminal", QStringList() << QString("sudo pacman -Syyu 2>&1 && rm \"" + file->fileName() + "\"; read -p 'Press enter to exit'"));
+    connect(process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished), this, [this, process, file](int exitcode, QProcess::ExitStatus status) {
+        process->deleteLater();
+        file->deleteLater();
+        if (exitcode == 0 && !file->exists()) {
+            relaunchSelf("POST_UPDATE");
+        } else {
+            relaunchSelf("UPDATE_RETRY");
+        }
+    });
+}
+
+void SnigdhaOSAssistant::doApply(){
+    QStringList packages;
+    QStringList setup_commands;
+    QStringList prepare_commands;
+    auto checkboxList = ui->selectWidget_tabs->findChildren<QCheckBox*>();
+    for (auto checkbox : checkboxList) {
+        if (checkbox->isChecked()) {
+            packages += checkbox->property("packages").toStringList();
+            setup_commands += checkbox->property("setup_commands").toStringList();
+            prepare_commands += checkbox->property("prepare_commands").toStringList();
+        }
+    }
+
+    if (packages.empty()) {
+        updateState(State::SUCCESS);
+        return;
+    }
+
+    if (packages.contains("libreoffice-fresh"))
+        packages.removeAll("libreoffice-still");
+
+    if (packages.contains("podman"))
+        setup_commands += "systemctl enable --now podman.socket";
+    if (packages.contains("docker"))
+        setup_commands += "systemctl enable --now docker.socket";
+    if (packages.contains("virt-manager-meta") && packages.contains("gnome-boxes"))
+        setup_commands += "systemctl enable --now libvirtd";
+
+    packages.removeDuplicates();
+
+    QTemporaryFile* prepareFile = new QTemporaryFile(this);
+    prepareFile->setAutoRemove(true);
+    prepareFile->open();
+    QTextStream prepareStream(prepareFile);
+    prepareStream << prepare_commands.join('\n');
+    prepareFile->close();
+    QTemporaryFile* packagesFile = new QTemporaryFile(this);
+    packagesFile->setAutoRemove(true);
+    packagesFile->open();
+    QTextStream packagesStream(packagesFile);
+    packagesStream << packages.join(' ');
+    packagesFile->close();
+    QTemporaryFile* setupFile = new QTemporaryFile(this);
+    setupFile->setAutoRemove(true);
+    setupFile->open();
+    QTextStream setupStream(setupFile);
+    setupStream << setup_commands.join('\n');
+    setupFile->close();
+
+    auto process = new QProcess(this);
+    process->start("/usr/bin/exec-terminal", QStringList() << QString("/usr/lib/snigdhaos-assistant/apply.sh \"") + prepareFile->fileName() + "\" \"" + packagesFile->fileName() + "\" \"" + setupFile->fileName() + "\"");
+    connect(process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished), this, [this, process, prepareFile, packagesFile, setupFile](int exitcode, QProcess::ExitStatus status) {
+        process->deleteLater();
+        prepareFile->deleteLater();
+        packagesFile->deleteLater();
+        setupFile->deleteLater();
+
+        if (exitcode == 0 && !packagesFile->exists()) {
+            updateState(State::SUCCESS);
+        } else {
+            updateState(State::APPLY_RETRY);
+        }
+    });
+}
+
+void SnigdhaOSAssistant::doNvidiaCheck(){
+    auto process = new QProcess(this);
+    process->start("mhwd", QStringList() << "-li"
+                                         << "--pci");
+    connect(process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished), this, [this, process](int exitcode, QProcess::ExitStatus status) {
+        process->deleteLater();
+        if (exitcode == 0 && !QString(process->readAllStandardOutput()).contains("nvidia")) {
+            auto process2 = new QProcess(this);
+            process2->start("mhwd", QStringList() << "-l"
+                                                  << "--pci");
+            connect(process2, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished), this, [this, process2](int exitcode, QProcess::ExitStatus status) {
+                process2->deleteLater();
+                if (exitcode == 0 && QString(process2->readAllStandardOutput()).contains("nvidia"))
+                    updateState(State::NVIDIA);
+                else
+                    updateState(State::SELECT);
+            });
+        } else {
+            updateState(State::SELECT);
+        }
+    });
+}
+