There is an Installation always popping up on my pc , and I hit cancel and it pops up again, after a while, I NEED to delete this how do I do it , Thank you!!!nleite......  What is it thats trying to INSTALL itself?
What program are you OPENING that brings up the installer ? and is it always the same app that brings it up ?
Have you TRIED letting it run ?

dl65  It opens it different applications it is something called photo gallery, I might have downloaded it now it it is trying to Install itself however It cannot find the rest of the software to complete the Installation it is asking me for a CD I do not have it, I just want to clear the Installation out of my computer so it stops thanksIf you go to start, run, msconfig, startup tab, look for it in the list and untick it.it SAYS acces denied to switch the administration , but I am the only userRun an antivirus and and antispyware scan.

Alan <><  I do not understand what a antivirus program has to do with this but .....

Now you say you are the only user well if so is there two accounts on your computer?.  The one you use and the administrator's?  You got to do what Neil has suggested so check accounts again and find out how many you have and if you are the only user it has to be an administrator account.I had this same problem and had to go into Control Panel to remove the program that kept trying to install. It has solved the problem.