I can work successfully with Windows 7 and FileMaker 12. You might try:
- Run a utility to confirm that hard drive is in good shape
- Create a new user account and use it to test a brand new file to see if this still happens. (Your other files might have file damage either before the crash or as a result of a crash.)
- Run Recover on your files to see if any issues are reported.
- Re-install Filemaker 12 and be sure to run the updaters afterwards if such are needed.
Things to keep in mind about Recover:
While Recover almost always detects and fully corrects any problems with your file...
- The recovered copy may behave differently even if recover reports "no problems found".
- Recover does not detect all problems
- Recover doesn't always fix all problems correctly
- Best Practice is to never put a recovered copy back into regular use or development. Instead, replace the damaged file with an undamaged back up copy if this is at all possible. You may have to save a clone of the back up copy and import all data from your recovered copy to get a working copy with the most up to date information possible.
And here's a knowledgebase article that you may find useful: What to do when your file is corrupt (KB5421).