When,I go to click on internet explorer,instead of it coming up,a little box comes up that says windows installer,inside it says preparing to install.It takes about 4 minutes for it to work,and finally lets internet explorer come up.Then it also comes up in a random fashion when switching to other sites also.I tried to do system restore,from a spot when it did not come up, but it did not work,as the installer still came up.I have all the virus/spyware installed.I have a hp media center 1160 computer,approx 2 yrs. old.I connect via cable modem.Since I have teens using the same computer,it has had sev.crashes in this period of time.I have not been able to get thru the maze of help solutions that xp has to offer,to fix the problem.