You can try using an uninstaller to remove Adobe Reader 8 (Microsoft Windows CleanUp Utility)
Once Adobe Reader 8 is removed you can Download Adobe Reader X from here : ftp://ftp.adobe.com/pub/adobe/reader/win/10.x/10.1.3/en_US/AdbeRdr1013_en_US.exe
You may try running the Acrobat and Reader Cleanup Tool
Download Reader's full installer from
After downloading, restart your computer and run the installer before doing anything else.