Peoblem with zwift application in in pc

for a few days, I’ve been having problems with my pc starting a workout on zwift, after 2 minutes of opening the workout, the pc freezes and restarts, while if I open the mobile app it works fine!

Please provide a full rundown of your setup. Without any information it’s hard to provide any assistance.

what do you mean by rundown?

see this: Guidelines for Seeking Support on the Forum

Look for clues in the Windows Event Viewer