Strange key behaviour associated with HotKeySet?

[dgloveruk]

I've written a script which works fine for blocking attempts to use printscreen to capture data. It also provides a means of overiding the blocked printscreen. 50 users have this installed and all was ok with the printscreen blocking but 3-4 times a week various people called me to say that various keys on their keyboards have ceased responding, like R, S,T and E. Changing program focus and returning to the original application seemed to resolve this. It took me a few weeks of dabbling to find that by disabling my autoit script these problems have gone away.

Is there an issue with using HotKeySet in this way that may cause other keys to go to sleep?

$catch = ""

Opt("TrayIconHide", 1)

HotKeySet("{PRINTSCREEN}","NoChanceMatey")

HotKeySet("^{PRINTSCREEN}","NoChanceMatey")

HotKeySet("!{PRINTSCREEN}","NoChanceMatey")

HotKeySet("+{PRINTSCREEN}","NoChanceMatey")

HotKeySet("!+{PRINTSCREEN}","NoChanceMatey")

HotKeySet("^!{PRINTSCREEN}","NoChanceMatey")

HotKeySet("^+{PRINTSCREEN}","NoChanceMatey")

HotKeySet("^!+{PRINTSCREEN}","NoChanceMatey")

HotKeySet("#{PRINTSCREEN}","SecretOption")

HotKeySet("#!{PRINTSCREEN}","NoChanceMatey")

HotKeySet("#^{PRINTSCREEN}","NoChanceMatey")

HotKeySet("#!+{PRINTSCREEN}","NoChanceMatey")

HotKeySet("#+{PRINTSCREEN}","NoChanceMatey")

HotKeySet("#+^{PRINTSCREEN}","NoChanceMatey")

HotKeySet("#!+^{PRINTSCREEN}","NoChanceMatey")

do

sleep(1000)

until 0

func NoChanceMatey()

if $catch <> "Allowed" then

Send("#l")

endif

endfunc

func SecretOption()

$passwd = InputBox("Security Check", "Enter your password.", "", "*")

if $passwd = "override" Then

$catch = "Allowed"

EndIf

EndFunc