Ytdyklly

First of all I have tried many methods but they didn't worked.
I am using dell inspiron 5570 and dual booted ubuntu 18.10 (upgraded from 18.04) and windows.
Here are some outputs :

systemd-analyze 

Startup finished in 9.741s (firmware) + 8.671s (loader) + 5.543s (kernel) + 1min 1.259s (userspace) = 1min 25.215s

graphical.target reached after 1min 1.239s in userspace



    systemd-analyze critical-chain 

The time after the unit is active or started is printed after the "@" character.

The time the unit takes to start is printed after the "+" character.



graphical.target @1min 1.239s

└─multi-user.target @1min 1.239s

  └─teamviewerd.service @59.453s +1.785s

    └─network-online.target @59.451s

      └─NetworkManager-wait-online.service @45.485s +13.964s

        └─NetworkManager.service @38.320s +7.163s

          └─dbus.service @38.316s

            └─basic.target @37.136s

              └─sockets.target @37.136s

                └─snapd.socket @37.121s +14ms

                  └─sysinit.target @36.927s

                    └─haveged.service @36.926s

                      └─apparmor.service @32.777s +4.148s

                        └─local-fs.target @32.732s

                          └─boot-efi.mount @32.616s +116ms

                            └─systemd-fsck@dev-disk-byx2duuid-9EE8x2d695F.serv

                              └─dev-disk-byx2duuid-9EE8x2d695F.device @30.536s



systemd-analyze blame

     24.686s dev-sda8.device

     20.600s systemd-journal-flush.service

     15.304s udisks2.service

     14.904s apport-autoreport.service

     14.380s networkd-dispatcher.service

     13.964s NetworkManager-wait-online.service

     13.053s ModemManager.service

     12.915s snapd.service

     12.856s accounts-daemon.service

     10.455s dev-loop9.device

     10.203s dev-loop18.device

     10.044s dev-loop19.device

      9.971s dev-loop20.device

      9.961s dev-loop13.device

      9.931s dev-loop11.device

      9.443s dev-loop17.device

      9.221s dev-loop10.device

      9.198s dev-loop12.device

      9.010s dev-loop15.device

      8.940s dev-loop16.device

      8.668s avahi-daemon.service

      8.594s dev-loop8.device

      8.491s networking.service

      8.425s dev-loop14.device

      8.236s systemd-logind.service

      8.236s thermald.service

      8.235s bluetooth.service

      8.232s grub-common.service

      8.226s gpu-manager.service

      8.192s alsa-restore.service

      8.189s apport.service

      8.072s dev-loop7.device

      7.677s dev-loop2.device

      7.414s dev-loop5.device

      7.163s NetworkManager.service

      7.162s wpa_supplicant.service

      7.101s rsyslog.service

      7.101s switcheroo-control.service

      6.810s plymouth-quit-wait.service

      6.290s dev-loop6.device

      6.178s colord.service

      6.115s dev-loop4.device

      5.934s dev-loop3.device

      5.876s dev-loop0.device

      5.867s dev-loop1.device

      4.568s systemd-udevd.service

      4.148s apparmor.service

      3.488s gdm.service

      2.794s systemd-rfkill.service

      2.264s keyboard-setup.service

      2.047s systemd-fsck@dev-disk-byx2duuid-9EE8x2d695F.service

      2.001s systemd-resolved.service

      1.870s snap-gnomex2d3x2d26x2d1604-74.mount

      1.854s openvpn.service

      1.788s snap-gnomex2dcalculator-238.mount

      1.785s teamviewerd.service

      1.575s systemd-modules-load.service

      1.562s dns-clean.service

      1.509s systemd-sysusers.service

      1.484s fwupd.service

      1.468s polkit.service

      1.438s snap-gnomex2dsystemx2dmonitor-54.mount

      1.429s snap-gtkx2dcommonx2dthemes-808.mount

      1.428s systemd-tmpfiles-setup.service

      1.428s snap-gnomex2dsystemx2dmonitor-51.mount

      1.388s snap-core-6034.mount

      1.377s snap-gtkx2dcommonx2dthemes-701.mount

      1.346s snap-gnomex2dcalculator-222.mount

      1.318s grub-initrd-fallback.service

      1.317s snap-gtkx2dcommonx2dthemes-818.mount

      1.311s snap-core-6259.mount

      1.221s kerneloops.service

      1.196s pppd-dns.service

      1.195s sysstat.service

      1.036s systemd-sysctl.service

      1.013s snap-gnomex2d3x2d26x2d1604-70.mount

       993ms console-setup.service

       992ms systemd-tmpfiles-setup-dev.service

       990ms packagekit.service

       886ms snap-core-6130.mount

       862ms swapfile.swap

       712ms snap-gnomex2dcharacters-124.mount

       681ms systemd-backlight@backlight:intel_backlight.service

       679ms systemd-backlight@leds:dell::kbd_backlight.service

       652ms snap-gnomex2dlogs-45.mount

       639ms snap-gnomex2dcharacters-117.mount

       624ms systemd-timesyncd.service

       598ms systemd-journald.service

       592ms snap-gnomex2dlogs-40.mount

       584ms snap-gnomex2d3x2d26x2d1604-59.mount

       560ms systemd-random-seed.service

       552ms snap-gnomex2dcalculator-260.mount

       543ms upower.service

       536ms snap-gnomex2dcharacters-139.mount

       522ms snap-gnomex2dlogs-43.mount

       481ms systemd-udev-trigger.service

       455ms dev-mqueue.mount

       436ms dev-hugepages.mount

       436ms kmod-static-nodes.service

       435ms systemd-remount-fs.service

       435ms sys-kernel-debug.mount

       434ms ufw.service

       387ms systemd-user-sessions.service

       372ms plymouth-read-write.service

       371ms plymouth-start.service

       286ms snapd.seeded.service

       219ms snap-gnomex2dsystemx2dmonitor-57.mount

       200ms setvtrgb.service

       145ms bolt.service

       131ms systemd-update-utmp.service

       116ms boot-efi.mount

        88ms user@1000.service

        80ms ifupdown-pre.service

        24ms rtkit-daemon.service

        15ms systemd-update-utmp-runlevel.service

        14ms snapd.socket

         1ms sys-fs-fuse-connections.mount

         1ms sys-kernel-config.mount