g77 Problem

I have been using NONMEM VI with the g77 Fortran compiler on a Dell laptop running Vista since last year with no problems. After not using NONMEM for some time, I tried to run a previously successful control file yesterday and the job wouldn't run. I suspected that the problem might be with the g77 compiler so I attempted to test g77 installation by creating and running the "hello.for" test file as described in the NONMEM installation instructions. When I attempted to compile the file from a DOS command, I got the following: C:\nmvi2\run>g77 hello.for -o hello.exe Info: resolving __fmode by linking to __imp___fmode (auto-import) Info: resolving __fpreset by linking to __imp___fpreset (auto-import) C:/PHSTMinGW/bin/../lib/gcc/mingw32/3.4.5/../../../crt2.o:crt1.c:(.text+0x37 ): u ndefined reference to `__cpu_features_init' C:/PHSTMinGW/bin/../lib/gcc/mingw32/3.4.5/../../../crt2.o:crt1.c:(.text+0x89 ): u ndefined reference to `_pei386_runtime_relocator' fu000001.o:(.idata$2+0xc): undefined reference to `libmsvcrt_a_iname' fu000002.o:(.idata$2+0xc): undefined reference to `libmsvcrt_a_iname' fu000004.o:(.idata$2+0xc): undefined reference to `libmsvcrt_a_iname' fu000005.o:(.idata$2+0xc): undefined reference to `libmsvcrt_a_iname' nmth000000.o:(.idata$4+0x0): undefined reference to `_nm___fmode' nmth000003.o:(.idata$4+0x0): undefined reference to `_nm___fpreset' collect2: ld returned 1 exit status C:\nmvi2\run> I reinstalled the g77 compiler and ran the hello.for file and got the same message again as shown above. As I have had a problem with bad RAM on the laptop before, I tested the RAM and found that the ram was fine. I have no idea what the message means. If anyone has had this experience before or could offer a suggestion on what I might try to overcome the problem, I would be greatly appreciate any suggestions. Thanks, Lloyd Whitfield