16-bit MS-DOS Subsystem path to the program that you are trying to start or install C:\Winnt\System32\config.nt The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose 'Close' to terminate the application.
I have removed acrobat reader 5 and then loaded it from a CD. Still all I get is gobbledegook from the web. I can read files which are on the PC! but cannot copy them off a webpage. Clicking on the webpage equally useless, it used to work OK I guess there is something set wrong somewhere.
I recently experienced a similar problem and tried the usual solutions of upgrading from 5 to 6, then 6 to seven, but none improved the situation. In the end I deleted all the references to Adobe via the control panel and then installed version 7 from Adobe.Com.
Since then, fingers crossed, everything is working fine. It's worth a try.