Hi Animish
I am Dave, I will help you with this.
Please upload any minidump files you have, I will check those to see if they provide any insight into a potential cause of the system crashes, below is the method to get past that permissions problem.
Open Windows File Explorer.
Navigate to C:\Windows\Minidump
Open that minidump folder
Select any files in there and press Ctrl + C to copy those files
On your Desktop, right click and choose New - Folder
Go into that new folder and press Ctrl + V to paste a copy of those files
Log into OneDrive: https://onedrive.live.com/
Drag that new folder form your Desktop into the OneDrive page and wait for it to upload
When it has uploaded, right click the folder on the OneDrive page and choose Share
Click Copy Link
Then post that link here.