Hello Rimon Minhas,
That system no longer supports Windows 7 properly
Upgrade Windows (recommended)
Move to: Windows 10 or Windows 11
This is the only reliable fix.
Option 2: Try browser-based login workaround (may fail):
Logging into Microsoft account in a browser first --> Then opening Lunar Client
Use: Older Lunar Client builds - but it's not recommend and not secured (you account may be compromised)
It's time to upgrade your OS (Back up your data first). Let me know if you need help with the upgrade.
Regards,