This has repeated 4 times (downloaded 9.3 and installed) since I got a new laptop two months ago. All icons become unusable with error SC_Reader.ico. Adobe help was call but since this is a free product, no help was provided. I have had several other technical support people help me with no results. The only way to get back my normal functions with the desktop icons is to uninstall Adobe. I am now us FOXIT for a pdf files and it works well.