- All programs that have global hotkeys can interfere with AutoHotkey, so for example (anti-)keyboard loggers, clipboard tools etc.
- Anti-virus and anti-malware software (disable them temporarily and try again, if AutoHotkey works try white listing AutoHotkey)
Hotstring and Hotkeys
- If they work everywhere except in your browser: Webroot or similar programs to protect the browser seem to be blocking AutoHotkey
- Don't work at all: Synergy, KeyScrammbler
Feel free to post other programs...