can't reinstall Adobe Reader 6.0.1

I uninstalled Adobe Reader, but I can't reinstall because my computer still thinks the old program is there.  History: AR 6.0 was working fine. Then my daughter installed AR 6.0.1.  This caused 3 or 4 message windows to pop up every time we tried to open a pdf.  The messages said that two plug-ins with the same name were trying to work at the same time.  It was aggravating to have to click through these message windows every time, so I uninstalled AR in Settings-Control Panel-Add/Remove Programs.  AR disappeared from the list of programs as it should have.  Then I tried reinstalling AR 6.0.1.  It downloads OK, but will not install completely.  I get nearly all the way through the Setup Wizard until I get an error message telling me that the installation file I need is on a network resource that is not available.  A search of my computer tells me that the installation file is located in several folders.  But the setup wizard won't accept any of these folders.  I keep getting told that it is an invalid folder.  When I finally give up and hit cancel, I am told that "the old 6.0.1 program can not been removed."  However, the old program is nowhere to be found.  I am unable to open a pdf, so I know the program is gone.  I have tried the entire process several times, but no go.  On top of all this, I find out that  System Restore has not been creating restore points periodically like it is supposed to.  The only restore point available to me is the point afterwhich I uninstalled AR yesterday.  Help.