diff --git a/src/gui/accountstate.cpp b/src/gui/accountstate.cpp
index 600650fa5..289717f4b 100644
--- a/src/gui/accountstate.cpp
+++ b/src/gui/accountstate.cpp
@@ -179,6 +179,15 @@ void AccountState::checkConnectivity()
         conValidator->checkAuthentication();
     } else {
         // Check the server and then the auth.
+
+#ifdef Q_OS_WIN
+        // There seems to be a bug in Qt on Windows where QNAM sometimes stops
+        // working correctly after the computer woke up from sleep. See #2895 #2899
+        // and #2973.
+        // As an attempted workaround, reset the QNAM regularly if the account is
+        // disconnected.
+        account()->resetNetworkAccessManager();
+#endif
         conValidator->checkServerAndAuth();
     }
 }
diff --git a/src/libsync/account.cpp b/src/libsync/account.cpp
index 5d2db3475..990b482d2 100644
--- a/src/libsync/account.cpp
+++ b/src/libsync/account.cpp
@@ -271,6 +271,21 @@ void Account::clearCookieJar()
     _am->setCookieJar(new CookieJar);
 }
 
+void Account::resetNetworkAccessManager()
+{
+    if (!_credentials || !_am) {
+        return;
+    }
+
+    qDebug() << "Resetting QNAM";
+    QNetworkCookieJar* jar = _am->cookieJar();
+    _am->deleteLater();
+    _am = _credentials->getQNAM();
+    _am->setCookieJar(jar); // takes ownership of the old cookie jar
+    connect(_am, SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)),
+            SLOT(slotHandleErrors(QNetworkReply*,QList<QSslError>)));
+}
+
 QNetworkAccessManager *Account::networkAccessManager()
 {
     return _am;
diff --git a/src/libsync/account.h b/src/libsync/account.h
index 1397195dc..3d8604f2b 100644
--- a/src/libsync/account.h
+++ b/src/libsync/account.h
@@ -156,6 +156,7 @@ public:
 
     void clearCookieJar();
 
+    void resetNetworkAccessManager();
     QNetworkAccessManager* networkAccessManager();
 
     /// Called by network jobs on credential errors.