Display peripheral manager, crashed and slowed down my xps

I have been using Dell collaboration keyboard, Dell monitor and a premium compact mouse for more than a year. The setup was customized for my banking use including keystrokes and monitor layout. There was a software update prompted on 26th with the dell application used for peripherals. The update stuck at 50% for a long time and the prompt disappeared all of a sudden.

After the incomplete update, the previous dell application was not found! There were strange behavior with the keyboard mouse and overall system.

1) All the configured settings were lost! This is frustrating. A suite of comfort lost over a malicious update!
2) Mouse pointer movement was draggy and slow when hover over the monitor
3) Task bar disappeared, until system rebooted
4) Monitor settings went haywire
5) Overall the system slowed down

Upon checking further, a new application with almost invisible icon was found in task bar. Launching the application, all the devices showed up. click next and the progress circle stayed there a long time (extremely lagging..) moving between different menus crashed and the application disappeared all of a sudden! Annoying experience! Overall my XPS was slow with this malicious application.. tried to uninstall and the uninstallation took an era. Had to reboot the system twice to bring back my XPS to normal working condition. I lost the previous application. Please advise where and how can I get back my previous application running.

<Profanity is not allowed. You failed to state which specific XPS Laptop and which specific Dell monitor model. DELL-Admin>