Hello Danny Chauhan,
Yes, you can remotely access another Windows PC to support a user while they are working on their screen, and Microsoft Quick Assist is probably the best solution for your situation.
Quick Assist is built into Windows 10 and Windows 11 and allows you to view the user's screen, request remote control, and troubleshoot problems without interrupting their signed-in Windows session.
- On your PC, open Quick Assist (press Ctrl + Windows + Q).
- Sign in with your Microsoft account (your Hotmail account can be used).
- Select Help someone and share the generated security code with the remote user.
- The remote user opens Quick Assist, enters the code, and approves screen sharing.
- You can then request control of their PC, which they must approve.
A VPN is not required, because Quick Assist establishes an encrypted connection through Microsoft's service over the internet.
One important distinction: your Hotmail account authenticates you as the support person; it does not automatically grant access to the remote PC, and the user must approve each session.
If you specifically require a VPN-based solution, that would involve a different setup, such as Windows Remote Desktop over VPN, although standard RDP is less suitable for assisting someone on their existing screen.
Microsoft's official guide: Use Quick Assist to help users