can't install new programs

[scott]

I can't install new programs on my system (XP Home
edition). The AutoPlay is turned on but the Install
Wizard does not come up. I also use "run" in the start
menu and have went through "My Computer", right-click on
cd-rom drive, "open". I can open files and folders, such
as "read me" but I get no response from the setup.exe
file. I have tried multiple new software programs and
none of them work. I tried them on a different cumputer
(same operating system) and they worked fine.
I check the task manager and it shows a process called
setup.exe

Also, this may be related... When logging off (start
menu, log off, log off) a window with a progress bar pop
us and says "End HTML package" and has one button that
says "end now". After I have atttempted to open a
setup.exe file and I log off then click the "end now"
button, for s split second you can see the install wizard
start up but then it logs off.

Any ideas?