I've suddenly been having intermittent problems with Mach 3 after 5 years of use for my router.  Jog stops working, auto zeroing Z axis won't move, odd extra stuff on tool path screen.  Closing and re-opening Mach 3 seems to fix it for a while, then same stuff occurs. 

My setup - dedicated off-line old Windows XP box, Techno Davinci router, Kress router spindle, oem drivers replaced with Gecko 540.  Very simple programs, very occaionnal use - slotting and profiling banjo fingerboards, cutting and inlaying pearl. 

This all started after I forgot to shutdown the computer for a month or so, and then it wouldn't boot up.  Discovered it needed a new CMOS battery.  Worked fine after replacing it, but then I started getting these problems. 

I'm wondering if somehow Mach 3 got corrupted when the machine shut down?  Would removing and reloading it solve this?  If so, how can I save all my settings?

"This all started after I forgot to shutdown the computer for a month or so, and then it wouldn't boot up.  Discovered it needed a new CMOS battery.  Worked fine after replacing it, but then I started getting these problems. "

Most likely BIOS settings were reset to default which may cause problems with Mach3, e.g.
Is the PC now looking for non-existent floppy drive, using interrupts to try and use serial port, game port, audio, etc.
Disable power saving modes in BIOS, unused ports, etc.

Marsha