Since Reader is a "light" version of Acrobat (only the read portion) and is derived from it, there will be Acro named files on the system when Readeris installed.
My understanding is that the Windows Installer Cleanup Utility (msicuu2.exe) completely removes any files left behind by an installer when the program is uninstalled. Using it would have likely saved you the trouble you went through in this case.
Yes. Once you have the Security dialogue box opened in Safe Mode, as described, you will probably see two vertical lines of six boxes, two boxes shaded and ticked (Read and Execute; and Read). Under Allow, click Full Control at top. It and the two other unshaded, blank boxes under Allow (Modify and Write) will become ticked. Click Apply. Click OK. (Note! When going back to look, I did not of course click Apply then OK, having no need to change the permissions again - so the direction "Click Apply. Click OK" is in fact an assumption on my account, although I can't think what else one might do at that point.)
The below image is what you should see in the first instance:
Hope my contribution here has helped. I was six hours trying to get rid of those files!!
Thanks Mac+Win=Me! My last crossed with your answer to my first. I used Revo. I have Installer Clean-Up and Adobe Reader 9.3.2 [9.3.2] is plain to see there. I will be interested to know if it will take out those four files, when next uninstalling. Revo removed a great deal. Those were the only significant Reader/Acrobat items it could not. It does look like Adobe would prefer those files to stay, willy-nilly, so as to assist IE8 opening PDFs, if they, the files, can do so without the rest of Reader in situ, which possibly they can't. Time will tell. They certainly have been given special treatment.