Currently, the following problems are known to the developers of F-PROT:

#1 Problem running F-PROT on some IBM ThinkPad models. 

   Some users of IBM ThinkPad machines have experienced a total failure of
   F-PROT (DOS version) to run on their machines.  The reason is the
   following: We use the CauseWay DOS extender program to create the DOS
   version.  The ThinkPad models in question run some programs from
   SystemSoft, including one named CARDXTND.SYS, which uses an old 16-bit
   DOS extender from Rational, which is simply not compatible with
   applications made with other DOS extenders.  In effect, while
   CARDXTND.SYS is running, no CauseWay application (or for that matter,
   application using other extenders) can be run, not even a simple "Hello
   World" program.

   There is nothing we can do to fix the problem, and we consider it
   entirely the fault of SystemSoft - however, they have not yet (as of
   Aug. 5th, 1998) responded to our E-mails regarding this issue.

   Until Systemsoft fixes the problem, CARDXTND.SYS must be disabled in
   order to run F-PROT on those machines.
