To me, it seems cheap that Windows doesn't let a program write to the folder it's located in unless you are have elevated user privileges.
- It's not cheap it's basic security. Someone with a limited user access account shouldn't be able to affect system-wide changes - that's just common sense. This change won't prevent you from using mIRC on a flash drive, you'll just have to add the -r switch to your mIRC shortcut. No big deal.